Dab tsi yog Txoj Cai Ua Haujlwm Ntawm Roj Perforating Phom?
Perforating phom yog ib qho ntawm cov cuab yeej tseem ceeb rau kev ua haujlwm perforating, uas muaj kev cuam tshuam zoo rau qhov zoo ntawm perforating. Sab hauv ntawm rab phom perforating yog qhov chaw kaw heev, uas ua lub luag haujlwm hauv kev sib cais cov mos txwv perforating, detonating cords, deton ...
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