Wrenches (spanners) must not be used if its jaws are sprung, worn or cracked. They may slip off a bolt or nut when you least expect it.

如果扳手(扳钳)的钳夹出现变形、磨损或裂纹，则不宜再使用。它们可能会在您始料未及之时导致螺栓或螺帽滑脱。

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The design of the bolt head insures that the bolt will not slip or rotate when the rubber is turned.

这种设计确保了在旋转橡胶的时候螺栓不会滑动或旋转。

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The SB series stuffing box cover combine the functions of wear plate and stuffing box into a one-piece replacement unit. One bolt holds the slip fitted stuffing box in place.

填料箱压盖将密封与填料箱的功能融为一个可更换的整体，一支螺栓安装在与填料箱相对应的中开面上。

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