ratchet n.棘轮,棘爪棘轮,棘齿轮...ratchet arrangement 棘轮装置...running ratchet train 转动棘轮装置...ratchet type jack 棘轮式千斤顶;伞齿轮式起重器...ratchet gear 棘轮装置...ratchet handle 棘轮手把...ratchet drive 棘轮驱动...ratchet gearing 棘轮联动...ratchet drill 手扳钻,棘轮摇钻...ratchet relay 棘轮继电器...stationary ratchet train 固定棘轮装置...brake ratchet 制动爪...brake ratchet wheel 制动轮;制动棘轮...arm of ratchet 棘轮臂...
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