... 企口开槽刨 match planes 钳口开度 span of jaw 钳口开关 valve for forceps opening ...
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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.
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。
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