压缩型金属爆破片 compressive type bursting disk
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一种新型爆破工艺，需要采用不可压缩介质作垫层，利用炸药的爆炸作用对粘土进行挤压，形成地下空间。
There is a new blasting technology which utilizes the explosion effect of the explosive to compact the soil to form the underground space with the non-compacted material as the cushion.
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