Can you take a stainless cane with 3 mm in diameter and drill a hole of 2 mm alongside the cane at the depth of 3 cm?
你能否用一根直径为3 mm的不锈钢棒，在旁边钻出一个直径为2 mm、深度为3 cm的孔？
Regardless of size, the main job of the contractor is to drill a hole to the depth and specifications set by the operating company.
无论大小，承包商的主要工作是按经营公司设计的深度和规格钻一个孔。
Supporting the use of impact drilling electric drill. Drilling, hole spacing with hole depth should meet the design requirements.
钻孔使用配套冲击电钻。钻孔时，孔洞间距与孔洞深度应满足设计要求。
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