Large, easy-to-read dial helps ensure rig safety Extra-large face and moving pointer provide instant trouble indications from a distance.
便于阅读的大表盘确保测量安全超大表盘和可动指针可以即时指出远程压力出问题的迹象。
Rather than wait for the other thread to finish, the current thread can "help" it out by finishing the operation for it by moving the tail pointer forward (b).
不必等候其他线程完成，当前线程就可以“帮助”它完成操作，把尾指针向前移动(B)。
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