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Written for the MINING AND SCIENTIFIC PRESS

机译:为采矿和科学新闻而写

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摘要

Those who use electric detonators in firing blasts will be interested in a new electrical testing instrument known as the'Blasters' Friend',recently devised by the New York Blasting Supply Co.of New York.Owing to the necessarily delicate construction of the platinum wire bridge in the shell of a detonator,it frequenuy happens that it becomes broken or disconnected;thus destroying the circuit and rendering the detonator worthless.In many cases,misfires and premature explosions are caused by defective detonators.Heretofore,to detect the deficiencies of a detonator before using has been an impossibility,owing to the absence of a testing instrument adapted to the purpose.
机译:那些在爆炸中使用电雷管的人会对一种新的电测试仪器感兴趣,该仪器是由纽约纽约爆破供应公司最近设计的,称为``爆破之友''。在雷管壳中架桥时,经常会发生雷管损坏或断开的情况;从而破坏电路并使雷管变得毫无价值。在许多情况下,雷管损坏会引起失火和过早爆炸。因此,在此之前,要检测雷管的缺陷。由于缺少适合该用途的测试仪器,因此在使用前不可能使用雷管。

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