... 雪檐Cornice 第一台阶The first step 顶峰Top ...
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当公标尖端部的第一台阶处折断后，尚有棘刺形的第二台阶与母标相扣合，避免了掉标的可能。
After the first step of the tip part of the male mark is broken off, the second thorn-shaped step is buckled with the female mark, which avoids the possibility of mark falling.
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