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US4867617A 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 a retract valve between the command valve and the air motor. This retract valve generates a required signal to only allow the drill quill to feed forward after it has been fully retracted
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