Disassembly unit must have the qualification of the tower crane disassembly operations, but also in the qualification range in installation and disassembly.
塔机拆装必须要具有资质的拆装单位进行作业，而且要在资质范围内从事安装拆卸。
No lift-manufacturing unit shall borrow from other units the qualification certificate of conducting lift manufacturing, installation, renovation or maintenance activity.
电梯生产单位不得向其他单位转借从事电梯制造、安装、改造和维修活动的资质证书。
The industry use background, industry policy, qualification management, technical principle, installation requirements, working manner and application prospect of household gas alarm are described.
论述了家用燃气报警器的行业使用背景、行业政策、资质管理、技术原理、安装要求、工作方式、应用前景。
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