wfyzgy
三种消防管件安装案例详解-专业生产消防沟槽管件,给水沟槽管件-潍坊 ...
合金管件对安装人员的素质要求并不高，安装时只要将扩口后的管材塞入管件的3/4 处，然后将卡环拉到位，就符合安装要求。验收时更加容易，只要一看卡环是否与 ...
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