NIB-SEAL on sweat ball valves are shipped unassembled.
在焊接球阀上,NIB-SEAL在装时处于未组装状态。
NIB-SEAL on sweat ball valves are shipped unassembled.
在焊接球阀上,NIB-SEAL在装时处于未组装状态。
The condensability of liquid,the Westphal's effect and the continuous flow condition are not only comprehensively considered,but also the dynamic property of the ball valve being established.
结合现场试验,根据直线电机采油泵动特性,综合虑了液体的可压缩性、魏氏效应、液体连续流动条件和球阀的动力特性,建立了直线电机采油泵球阀动规律的动微分方程组。
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