The Control Valve Handbook has been a primary reference since its first printing in 1965.
此控制阀手册从1965年第一次印刷起，就已经是一个主要的参考资料。
Objective To study the clinicopathologic features of primary cardiac valve tumors.
目的分析心脏瓣膜原发肿瘤病理学特点及其与临床表现的关系。
With flow through valve, primary check opens away from diaphragm seal.
当有流体通过阀门时，第一阀瓣开启从隔膜密封上离开。
With flow through valve, primary disc opens away from diaphragm seal.
当流体通过阀门时，第一阀瓣开启，从隔膜密封上离开。
With flow through valve, primary disc opens away from diaphragm seal.
当流体通过阀门时，第一阀瓣开启，从隔膜密封上离开。
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