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指导安装 zhǐdǎo ānzhuāng
environ. supervision of installation The oversight or direction over the process of setting up or making adjustments to a building or to a mechanical or electrical system or apparatus (建筑物或机械或电气系统或设备的安装和调节过程中的监督或指示。)
指导 安装
: 3 phrases in 2 subjects
Economy2
Oil / petroleum1