专利名称：Small-diameter drill
发明人：遠藤 篤，竹内 孝夫，大峯 恵
电动车简笔画申请号：JP2007008752
申请日：20071113
螃蟹粥公开号：JP3139044U
公开日：汇票是什么意思
20080131
朱自清的荷塘月色原文>班级图片
专利内容由知识产权出版社提供
专利附图：
摘要： The prent invention not to slide off when moving or carrying gripping the handle portion by the hand tool such as a clip, and provides a small-diameter drill ud for drilling a printed circuit board for an electronic circuit. The tool body 10 that forms the A substantially round rod-shaped, the blade portion 20 provided on the distal end side of the tool body 10, a shank 30 provided on the ba end side, a blade portion 20and a shank 30 a tapered portion 40 conical provided between is provided. In addition,the step portion 50 is formed between the shank 30 and the tapered portion, the diameter d1 in state-of-the-art the step portion 50 is reduced in the range of
10μm~70μm with respect to the diameter d of the shank, moreover, roughness of the surface of the
养生秘方
outer peripheral surface of the step portion 50 is t to be rougher than the surface roughness of the outer peripheral surface of the shank 30. .BACKGROUND
申请人：株式会社タンガロイ
地址：神奈川県川崎市幸区堀川町５８０番地 ソリッドスクエア梧桐树下
辞旧迎新贺词国籍：JP
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