摘要:
A lubrication apparatus for the ball screw unit in which the grease state lubricant is used. There is formed a helical guide track in the lubrication apparatus. When the ball screw unit operates, a guide member rotates with the bolt, the grease stored in the guide track will flow ahead to the front terminal of the guide track and ooze out of the grease outlet to lubricate the bolt with the aid of a pressure produced due to the inertia of the flowing fluid, and the quantity of the oozed grease is determined by the size of the grease outlet. The lubrication of the ball screw unit can be performed automatically without relying on the external force.
摘要:
A lubrication apparatus is for a ball screw unit in which the grease state lubricant is used. There is formed a helical guide track in the lubrication apparatus. When the ball screw unit operates, a guide member rotates with the bolt, the grease stored in the guide track will flow ahead to the front terminal of the guide track and ooze out of the grease outlet to lubricate the bolt with the aid of a pressure produced due to the inertia of the flowing fluid, and the quantity of the oozed grease is determined by the size of the grease outlet. The lubrication of the ball screw unit can be performed automatically without relying on the external force.
摘要:
A sofa cover tailoring procedure includes the steps of (a) preparing a main cover cloth member and marking turning points of each curved lateral side of the main cover cloth with marks A;B;B1;C;D;E; b), (b) preparing two symmetrical side cover cloth members and marking turning points of the curved border line of each side cover cloth members with marks a;b;b1;c;d2;d1;e;f;g;h; and (c) stitching segment ABB1 of the main cover cloth member to segment abb1 of each side cover cloth member, then stitching segment B1C of the main cover cloth member to segment b1c of each side cover cloth member, and then stitching turning points d1 and d2 of each side cover cloth member together, and then stitching segment CD of the main cover cloth member to segment cd 1(d2) of each side cover cloth member, and then stitching segment DE of the main cover cloth member 10 to segment d1(de)e of each side cover cloth member, and then stitching segment gf of each side cover cloth member to segment gh of the respective side cover cloth member, leaving an opening in the bottom side of the cover, and then fastening an elastic band to the periphery of the opening.
摘要:
A method and apparatus for dynamically generating code that generates a mapping between territories and territorial assignees is provided. A code generator uses the territory criteria to dynamically generate the code for an assignee-to-territory-mapping-engine. The generated code uses the territory criteria and the territorial assignees to produce an assignee-to-territory-mapping. The assignee-to-territory-mapping can be used to determine the sales representatives that are responsible for a particular territorial assignee.
摘要:
A screw-driven fan device includes a screw, a screw nut, a fan, and a connecting unit. An external edge of the screw has a rolling groove formed thereon and a groove formed alternately with the rolling groove. The screw nut, disposed on the screw, has a linking portion. The fan has a rotary axle with a hole formed thereon for screw passing through. The fan further has blades surrounding the rotary axle. The hole has a flange formed on an interior side thereof and engaged with the groove. The connecting unit has a space therein such that the fan can be placed in the space.
摘要:
This invention is a method for reducing the total acid number of organic acid containing petroleum oil comprising forming a water-in-oil emulsion comprising an aqueous Group IIA metal hydroxide solution or slurry in a hydrocarbon oil, said water-in-oil emulsion having an aqueous droplet particle size diameter of from 1 to 25μ, adding the water-in-oil emulsion to the organic acid containing petroleum oil and permitting the mixture to stand for a time sufficient to permit the neutralization of the organic acids in the petroleum oil.
摘要:
Aspects of the invention provide methods for rewriting and computing database queries that include outer join conditions, and for determining columns that satisfy a criteria. According to one aspect, a component relation key is assigned to each unique column in a first table and an aggregate relation key is generated for each record in a second table, wherein the aggregate relation key is based on one or more of the component relation keys corresponding to columns with non-null values from the second table. Distinct aggregate relation keys are determined, and an original query with an outer join is rewritten into at least a number of sub-queries equal to the number of distinct aggregate keys, wherein each sub-query includes a join condition based on each column represented by the respective distinct aggregate keys. Significantly, the combination of sub-queries is logically equivalent to the original query, but does not include outer join conditions. Therefore, a more efficient query is provided.