差动滑车组 differential tackles ; differential tackle ; differential block tackle ; differential purchase 蜗杆差动滑车 wormchainblock 差动滑车 差动链滑车...
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... differential axis 差动轴线 differential block tackle 差动滑车组 differential block 差动滑车 ...
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... differential pump 差动泵 differential purchase 差动滑车组 differential rate 差别费率 ...
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... 滑轮吊车 pulley block hoist 差动滑车组 pulley block; differential 掣子滑轮；棘轮 pulley; click ...
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