本文通过扫描电镜对寄生山羊体的山羊蠕形螨生活史各期颚体、足体和末体的超微结构观察。
The present paper reports the scanning electron microscopy observation on theultrastructure of gnathosoma, podosoma and opisthosoma in the life cycle of Demodexcaprae.
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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