发明授权
US5222844A Air logic circuit for airfeed peck drill 失效
用于空气啄钻的空气逻辑电路

Air logic circuit for airfeed peck drill
摘要:
An improvement to an air logic circuit for an airfeed peck drill includes the insertion of an advance valve into the timer circuit. This advance valve generates a signal to actuate the timer circuit only after the drill quill has fed forward through rapid advance.
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