The body and bonnet are best joined by holding the bonnet assembly open end up and dropping all required items into place one at a time.
装配时始终打开阀帽直到一次装入所有要求安装的配件可使阀体和阀帽良好配合。
The body and bonnet are best joined by holding the bonnet assembly open end up and dropping all required items into place one at a time.
装配时始终打开阀帽直到一次装入所有要求安装的配件可使阀体和阀帽良好配合。
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