阀杆可以安装在任何位置，但是如果能够选择阀杆位置的话，实践表明将阀杆水平安装在阀门上是最好的方式。
The stem can be installed in any position, but if a choice of stem positions exists, good practice dictates that the valve be installed with the stem horizontal.
手轮可以拆卸并重新定位在环绕阀杆的六个位置中的任何一个位置上。
The handwheel can be removed and repositioned any of six positions around the stem.
阀杆也应该在顶部配置方向指示器，用于当手柄拆卸下来时指示阀瓣的位置。
The shaft also shall have a directional indicator on top to indicate disc position when the handle is removed.
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