亦称颚板具、颚齿。在蛭类中的颚蛭类（寄生蛭等）的口腔壁上成对存在的三个几丁质的半圆形板，在其边缘有锐齿排列。
经现场试验表明，用空淬贝氏体钢浇注的颚板，其寿命是普通低合金钢颚板的两倍。
As shown by the experiments, the jaw grinders cast with air-quenched-bainite steel offer a life span twice as long as those made of ordinary low alloy steel.
消失模铸造生产大型高锰钢颚板，并按设计的工艺要求进行生产，利用余热水韧处理。
Large scale high manganese steel alligator board produced by EPC process can meet the request of design, and use with hot remained water toughening treatment.
PEXD型倒悬挂细碎颚式破碎机的活动颚板悬挂轴(偏心轴)倒悬挂在机器的底部。
The movable jaw suspending bearing (eccentric bearing) of PEXD style inverted fine jaw crusher suspends reversely at the bottom of the machine.
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