[矿业]
exchanging documents of mining survey
automatic antenna exchanging unit自动天线交换器 exchanging documents of mining survey矿山测量交换图 Exchanging two positions,functions,etc(位置、功能等的)转换 ..
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... 矿区控制测量 control survey of mining area 矿山测量 mine survey 矿山测量交换图 exchanging ...
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