如果我们希望所有位全部置位，那么一种可移植的方法是定义一个有符号的常数，其值为- 1。

If you want to turn all the bits on, a portable way to do this is to define a signed long constant with a value of -1.

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所述低压解除装置（4）还包括用以驱动所述可动件（7）从所述第一位置运动到所述第二位置的驱动件（8）；

The low-pressure relieving device (4) further comprises a driving piece (8) for driving the movable piece (7) to move to the opening position from the closing position.

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