Check modules are threaded into the valve adapter for leak proof operation.

止回阀模块通过螺纹旋进阀门适配器内，提供无泄漏运行。

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Check modules are threaded into the valve adapter for leak proof operation.

止回阀模块通过螺纹旋进阀门适配器内，提供无泄漏运行。

youdao