保护层的英文：
maskant

参考例句：
  • The backing must be teard off.
    保护层必须揭掉。
  • The scratch does not penetrate the coating layer to die.
    那一刮没有穿透保护层。
  • To treat(a semiconductor)with a dopant.
    加入掺杂剂用掺杂剂给(半导体)涂上保护层
  • a space reentry vehicle that was armed with a ceramic shield.
    重返大气层航天运载工具配备陶瓷保护层装置
  • Any accessories - acid shield, locking devices, chain operation, etc.
    任何附件:防酸保护层,锁定装置,链条操作,等等。
  • A protective or insulating layer fixed to the outside of a building or another structure.
    覆面固定到一座建筑物或其它结构上的保护层或绝缘层
  • These form a protective coating over the yarns and keep them from chafing or breaking during weaving.
    通过上浆给纱线施加了保护层,在织造时减少了对纱线的磨擦和纱线的断头。
  • They have a protective cover of bracts and scales from time of initiation
    从开始孕育时，花芽便具有一层由苞片和鳞片构成的保护层。
  • "Tear off protective backing from patch and apply patch with firm pressure, particularly at edge. "
    把补片的保护层揭掉，把补片用力压在内胎上，边缘特别要压紧。
maskant是什么意思：
保护层; 掩蔽体

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