Results 121 to 130 of about 3,532 (182)

[Genetic screening and follow-up results in 3 001 newborns in the Yunnan region]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Li AY   +10 more
europepmc   +1 more source

液压机构的泄压试验

open access: yesGaoya dianqi, 1981
当前,在高压开关的操动系统中,液压机构日益增多。高压开关的液压操作机构,要求打一次压能保持72小时以上。检修人员在检修中,如何能在很短时间内检查出液压机构系统的渗漏情况,测算出油泵起停的时间,是一个很有实际意义的问题。 去年以来,我们采用了百分表法进行测定,可在很短时间内测出液压系统的渗漏情况来,,从而能对检修质量很快地作出准确的鉴定。所谓百分表测定法 ...
doaj  

[Clinical Analysis of Supral-abyrinthine Cholesteatoma and Literature Review]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Qian W   +8 more
europepmc   +1 more source

[Chronic cough and otorhinolaryngology in children]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Li L, Jia D.
europepmc   +1 more source

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