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。
颚裂：一种常见的先天性疾病——胎龄两个月时颚板未能融合而遗留裂隙。
Cleft palate: Fairly common congenital disorder in which a fissure forms in the roof of the mouth.
优化破碎腔的颚式破碎机可提高破碎机的产量、破碎比且可降低颚板钢耗。
Jaw crusher wit optimized crushing chamber has high output, high crushing ratio and low steel consumption for jaw plate.
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.
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