May operate air-track, rotary, down-the-hole or other drilling machines to drill blast holes or may direct drilling of blast holes.
操作空气运作轨道，旋转，向下钻孔机或其他钻探机钻爆破洞或直接钻爆破洞。
The rotary adjusting, personalized air conditioning air blast end device belongs to the heat air conditioning field.
一种旋转调节型个性化空调送风末端装置，属于暖通空调技术领域。
The rotary adjusting, personalized air conditioning air blast end device belongs to the heat air conditioning field.
一种旋转调节型个性化空调送风末端装置，属于暖通空调技术领域。
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