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发明名称
PRIMER CENTERING DEVICE FOR LARGE DIAMETER BLASTHOLES
摘要
An improved method for reducing misfires in large diameter unlined blastholes by fitting on the primer used in the blasthole a centering device comprised of a semiconducting plastic material.
申请公布号
CA1315597(C)
申请公布日期
1993.04.06
申请号
CA19880578771
申请日期
1988.09.29
申请人
MCLAUGHLIN, PATRICK D.
发明人
MCLAUGHLIN, PATRICK D.
分类号
F42B3/185;F42D1/22
主分类号
F42B3/185
代理机构
代理人
主权项
地址
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