Slight tapping with a mallet may be required, but do not change the valve stem position.

如果需要，用木槌轻轻敲打，但是不要改变阀杆位置。

youdao

Slight tapping with a mallet may be required, but do not change the valve stem position.

如果需要，用木槌轻轻敲打，但是不要改变阀杆位置。

youdao