a structure or device in which one end is counterbalanced by the other (on the principle of the seesaw)
例句与用法
1.
Analysis and improvement on the plunger lever ' s slip from the oil cylinder of the bascule door ' s actuator on 100t landing craft 100吨登陆艇吊门传动装置油缸柱塞杆滑脱的分析与改进
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