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Oil / petroleum
containing
元组
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in specified order only
Chinese
English
井组单元
symmetry element
单
元组
装
unit assembly
单元机组
monobloc
双组元推进剂
dipropellant
同组元素
group element
底部钻具组合有限元模式
BHA finite element model
气动单
元组
合仪表
pneumatic unit assembly instrument
电动单
元组
合仪表
electro-unit assembly instrument
组元
constituent element
组构元素
structural element
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