煤矿中天然存有高爆气体。Highly explosive gas is naturally found in coal mines.许多人到煤矿来,是因为契约规定必须服务几年.Many people came to the coal mineindentured for several years.煤矿工人须在地下工作.Coal miners have to work under the ground....
There must be no kinks in the detonating fuse.引爆线中不应有扭曲和打结现象.In this paper, a new detonating system controlled by SCM is introduced.文章介绍的是一种新的以单片机为控制核心的起爆系统.This article introduces capacity feature and application method...
Soil compaction may limit horizontal root extension.土壤的紧密度能限制水平根的扩展.The broadbased attachment of the mesenteric root stabilizes the small bowel.肠系膜根部基底宽阔的附着面使小肠得以稳定.The forces of National Socialism were transforming Germ...