| 摘要 |
In the case of blasting tubes (explosive tubes), the aim is to achieve a watertight arrangement which can be designed cost-effectively. This is achieved in that an upper and a lower terminating bush (3 and 4) having three sealing elements are provided in a tube (2), two of the sealing elements being identical and their shape being different from that of the third sealing element. The arrangement consists of a small number of simple parts, the tube (2) with the terminating bushes (3 and 4) being effected by rolling the tube (2) into recesses (21, 22) in the terminating bushes, with the interposition of a flat sealing element (16). <IMAGE>
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