发明名称 |
BOOR. |
摘要 |
The present invention relates to an improved drill bit. In the present invention there are disposed opposite each other on a shank a cutting blade with no relief and a post. The post prevents a center swing and is of a small diameter equivalent to a cutting-in amount reduced. |
申请公布号 |
NL7803068(A) |
申请公布日期 |
1978.10.06 |
申请号 |
NL19780003068 |
申请日期 |
1978.03.22 |
申请人 |
AKIO YAMADA EN SHOHACHI SHIMIZU, BEIDEN TE OGAHI, JAPAN. |
发明人 |
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分类号 |
B27G15/00;(IPC1-7):B27C1/00 |
主分类号 |
B27G15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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