Objectives To investigate the effectiveness of PHV combined with low PEEP for severe asthma.
目的探讨允许性高碳酸的血症(PHV)联用低呼气末正压(PEEP)通气治疗危重哮喘的效果。
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Study of comparison between Wacker and PHV in reflection seismic survey for metallic orebody
轻便可控震源与夯击震源在金属矿地震勘探中的对比试验研究
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Design and industrial application of DOCP ( jl) catalyst for PHV upgrading
提高汽油辛烷值催化剂DOCP(jl)配方设计及工业应用
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PHV在唐山地区的实验结果证明它能够稳定、有效的工作,而且优于其它非爆炸性震源。
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