短語詞組短語balance weight lever casting 平衡鎚桿鑄件balance weight lever 配重桿;平衡重桿throttle balance lever 節(jié)氣門平衡桿signal balance lever 信號平衡鎚桿lever balance 杠桿天平;天平;複桿天平;繙譯Tonnage lever balance 杠桿式噸位天平multiplying lever balance 倍數(shù)杠桿天平compound lever balance 複桿天平lever balance theory 杠桿平衡原理 返回 balance lever