我厂金工车间,每天需大量的刀具。以前刀头焊接是靠外单位加工,用氧气焊接的。每把刀加工费需0.4元,同时耗铜量较大,加上氧气供应有困难,所以经常因刀具脱节影响生产。金工车
In the spring of 1934,Mr.T.F.Hou and the writer were instructed bythe Geological Survey of China to explore the provinces of Kansu~1 and Ninghsiawith a view to
1. Combeau, De la houille ses productions dans le monde entier, son emploi ses particularites 1921. $ 3.70
1. Combeau, De la houille ses productions dans le m
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DerTee (NachHeinrichHeine) DieGeschichte’dieichjetzterzahlenwill, spieItwiederindenBadernvonLucca1. Furchtedichnicht, deutsch
1.Chalicotherioide Remains from the Chinese Hipparion Fauna Chalicotherioidea gen.& sp.indet.Locality:Province Shansi,Loc.77.Age:Lower Pliocene. The only find
引言自早先美国Mead湖区由于蓄水而产生地震的记载以来,世界上已观测到不同强度的水库地震六十多例(见表)。显然,仍有相当多的地震,特别是那些强度在Ⅲ类*以下的微震未被察
The Hercynian movement,as it is known,embraces all the move-ments from the beginning of Carboniferous to the end of Permian.InChina it is only within the last
目的评价辽宁省6县市基层医疗单位就诊的缺血性脑卒中患者原发性高血压防治现状。方法 2007年3月～2008年10月采用分层整群抽样方法选择辽宁省本溪县、西丰县、阜新县、庄河市
The Yehlangian of Ting and Graban includes the Paoan shale,the Yülungshanlimestone,the Feihsienkuan shale and the Sanchiao limestone.In their opinion thesefor