预钻孔 meaning in English

pre-drill
predrilling
vorbohren rough-bore

The clutch bell is pre - drilled to accept governor sensor magnets
离合器钟预钻孔接受省长传感器磁体
Pre - drilled hole at panel ; led indicator hole 4mm dia . toggle switch hole
预钻孔面板; led灯孔4mm摇头电源10mm
Loading test kentledge for pre - bored h - pile tab construction from landside towards sea
预钻孔h -型钢桩压桩测试中的负重
To formally register minipiles and rock socket h piles as approved piling system and compile their corresponding list of approved contractors
将微型桩及预钻孔石套h型桩正式列为认可打桩技术，并编制微型桩认可承建商名单。
The controller is floor / base plate mounted by using the three pre - drilled holes in each leg . the holes are dimensionally on the same line for ease of mounting
控制装置是通过每个支柱的三个预钻孔安装在地面/底板上。这些孔位于同一条支线上，便于安装。

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