摘要:
A fluid coupling for a corrugated pipe, comprising a coupling body having an axial through hole and a cylindrical outer peripheral surface, metallic seal means arranged at a pipe insertion portion of the axial through hole, for sealing an end portion of a corrugated pipe, a first sleeve having a first end portion, slidably mounted on the outer peripheral surface of the coupling body and urged axially outward, ring-shaped engaging members adjoining the first end portion of the sleeve and reducible in diameter, and retaining means surrounding the sleeve and the engaging members so as to be movable relative to the coupling body and the sleeve, the retaining means being adapted to reduce the diameter of the engaging members so that the engaging members are forced into root portions of the corrugated pipe, whereby the engaging members are held in a predetermined axial position.
摘要:
A fluid coupling for a corrugated pipe, comprising a coupling body having a large-diameter portion and a small-diameter portion through which the corrugated pipe can be passed, metallic seal means arranged at the small-diameter portion, for sealing an end portion of a corrugated pipe pressed against the same, a ring-shaped engaging member disposed in the large-diameter portion and having its inside diameter reducible to a size smaller than the diameter of the top of corrugation of the corrugated pipe, and retaining means having an outside diameter small enough to be inserted into the small-diameter portion, an inside diameter large enough to be penetrated by the corrugated pipe, and a first end portion capable of engaging the engaging member, the retaining means being adapted to press the end portion of the corrugated pipe against the seal means, while transferring the elastic member from the large-diameter portion to the small-diameter portion, thereby holding the engaging member in a predetermined axial position such that the engaging member is located in a root portion of the corrugated pipe.
摘要:
An optical record disc is provided having a guide signal pit previously formed on a base plate for reading out a tracking information by a laser beam. A reflection film is coated on the base plate including the guide signal pit portion, and the record blank portion. A record layer of a removing type is formed over the reflection film. The record layer has a uniform thickness over the record layer and a uniform thickness, of substantially smaller dimension over the guide signal pit portion.
摘要:
In a wafer processing method, the back side of a wafer having a plurality of devices on the front side thereof is ground, thereby reducing the thickness of the wafer to a predetermined thickness. The back side of the wafer is polished after performing the back grinding step, thereby removing a grinding strain, and a silicon nitride film is formed on the back side of the wafer. The thickness of the silicon nitride film to be formed in the silicon nitride film forming step is set to 6 to 100 nm. Thus, the silicon nitride film having a thickness of 6 to 100 nm is formed on the polished back side of the wafer from which a grinding strain has been removed. Accordingly, each device constituting the wafer can ensure a sufficient die strength and a sufficient gettering effect.
摘要:
This invention provides a simultaneous packet transmission system and a simultaneous packet reception system which enable a reception side to receive simultaneous packets without transmitting a retransmission request to retransmit discarded simultaneous packets even if part of simultaneous packets are discarded. A wireless LAN base station multicasts a simultaneous packet which is obtained by allocating a sequence number to a LAN packet a plurality of times. If a wireless LAN terminal receives the same simultaneous packets a plurality of times, the wireless LAN terminal discards duplicated simultaneous packets and leaves only one simultaneous packet. Since the simultaneous packet is multicast a plurality of times, the wireless LAN terminal can receive the simultaneous packet as long as all the same simultaneous packets are not lost.
摘要:
A fast roaming system for changing, in a short period of time, the connection to a roaming destination AP (access point) providing a better communication environment, and for improving a roaming completion rate. In response to a search process performed by a mobile terminal, individual APs transmits AP data required for roaming directly to the mobile terminal. The mobile terminal performs the passive scanning search or the active scanning search for the peripheral APs at short time intervals, and obtains and stores the latest AP data in an AP data table. As a result, only the latest data for the connectable peripheral AP can be stored as a roaming destination in the AP data table. Furthermore, since the order condition is set by the mobile terminal to select the roaming destination AP, there is a high probability that the roaming is completed when the peripheral AP is first selected. Therefore, only a short period of time is required until the roaming is completed.
摘要:
Voice clauses are divided and transmitted as packet data in divided clause units in a transmission side. The voice data is outputted as voice based on the received packet data in clause units in a receipt side. Thus, the meaning of speech is even able to be recognized in a deteriorated communication path environment.
摘要:
The present invention makes it possible to expand wireless LAN areas without installing a plurality of LAN base stations or wireless LAN repeaters. A wireless LAN terminal has not only a wireless LAN terminal function to communicate with another wireless LAN base station, but also a wireless LAN base station function to communicates with a wireless LAN terminal. The wireless LAN terminal encapsulates a wireless LAN signal sent from another wireless LAN terminal and sends the encapsulated signal to the wireless LAN base station. The wireless LAN base station encapsulates a wireless LAN signal destined for a wireless LAN terminal and sends the encapsulated signal to another wireless LAN terminal.
摘要:
A VoIP system has a VoIP server and plural clients. The client transmits paging data as multicast packets addressed at a specific multicast address, to other clients. In response to a request from the client, the VoIP server transmits multicast packets of MOH data to the other clients. At this time, whether the other clients can receive multicast packets is determined. To the clients that are determined to be capable of receiving multicast packets, transmission data is sent in the form of multicast packets. To the client which belongs to a router and is determined to be incapable of receiving multicast packets, the transmission data is sent as unicast packets. It is thus possible for the VoIP system to support paging and MOH in the form of multicast packets, with respect to clients incapable of receiving multicast.
摘要:
A method for manufacturing feedstuff including the steps of: preparing wood chips containing large quantities of saw-dusts and/or wood fibers; preparing large quantities of fermentation bacteria, and mixing the wood chips with the large quantities of fermentation bacteria to obtain feedstuff for livestock; the method further including the steps of: preparing ultrafine organic particle substances by ultrafinely shattering waste organic substances such as garbage by using high-speed water flows of 8 m/second or more wherein the ultrafine organic particle substances include those of micrometer sizes created by shearing action of the high-speed water flows, adding the fermentation bacteria to the ultrafine organic particle substances to ferment them and proliferate the fermentation bacteria in great quantities, preparing the fermented ultrafine organic particle substances containing the large quantities of fermentation bacteria, and using the fermented ultrafine organic particle substances as the fermentation bacteria to be mixed with the wood chips.