问题很专业咧,分析一下1、金属之间的磨擦,是可以产生火花的,或者至少产生热量.2、不锈钢和钛金属,好象这两种都不可能自燃,如果能自燃,那得一千多度的温度,太可怕了吧?3、两种金属磨擦生热后,有可能会引起与之接触的可燃物发生燃烧,是不是消防部门说的就是这个?
This bill would require a local authority awarding a procurement contract for the purchase of a public transit vehicle to give a 10 percent preference to any bidder that agrees that all vehicles to be purchased under the contract are to be manufactured within the State of California. This bill...
While the carrier flew more seats, and achieved a higher load factor and yield, its tax bill shot up from $1 million to $120 million (allowances for previous years of losses were exhausted). TURKEY OPENS BOSPORUS TUNNEL, SPAIN CONSIDERS TIME CHANGE 16. On Tuesday, Turkey opened the new ...