Wear and it is also the economizer tube in boiler four tube blastingaccident accounted for the proportion of one of the reasons for high.
而且磨损也正是省煤器爆管在锅炉四管爆破事故中占的比例较高的原因之一。
2
Flying rock accident accounts for a great ratio of blasting accidents in open stone pits, which poses serious threat to safe production in mining area.
在诸多露天采场爆破事故中，飞石事故占很大的比率，对矿区的安全生产构成了严重威胁。
3
Hanamura on but what about the rest of the 3 groups of aggrieved Zhou said: I used to run a small fireworks plant, how much money did not earn, a blastingaccident but I get to go bankrupt.