... 脚制动连杆((1)foot brake connection rod(1) 缓解控制杆release control rod 棘爪(1)pawl(l) ...
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The control rod string which is consisted of pumping rod and controller is tripped into the release string.
抽油杆与控制器组成的控制杆柱下入到丢手管柱内，控制杆柱上部与杆式泵的进油孔相连。
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