作业帮countersink
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 21:28:59
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countersink
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countersink dot
暗钉眼孔
Drill and countersink the holes to keep wood from splitting.\x09
钻和锪孔,以保持木材的从分裂.
埋头孔点。。。