Pilot hole

A pilot hole is either a small hole drilled into a material to guide a larger drill to the appropriate location and ease the job of the larger drill, to allow for the insertion of another hole making tool, such as a knockout punch, that will produce the final size hole, or, in wood or plastic, to locate, guide, and provide clearance for a self threading screw to prevent damaging the material or breaking the screw.

单词	Pilot hole
释义	Pilot hole 原声例句厨房美味大比拼 What I like to do is make two sort of pilot holes, that'll help for the water to drain properly. 我喜欢做的是做两种导向孔，这将有助于水正常排出。英语百科 Pilot hole A pilot hole is either a small hole drilled into a material to guide a larger drill to the appropriate location and ease the job of the larger drill, to allow for the insertion of another hole making tool, such as a knockout punch, that will produce the final size hole, or, in wood or plastic, to locate, guide, and provide clearance for a self threading screw to prevent damaging the material or breaking the screw.
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