The line block valves are of vital importance for the safety operation of the pipeline.

线路截断阀是管道安全运行的重要保证。

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Three-way valve has three entrances and pipes, equivalent to two single-Block valves synthetic one.

三通阀有3个出入口与管道相连，相当于两台单座阀合成一体。

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Distortion tests show that NIBCO block valves resist the distortive forces which result from such abuse.

变形试验表明美国尼伯科关闭阀能够经受住上述滥用所产生的变形力。

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One long oblong of speaker-grille, punctuated by a central block that houses the all important valves, as well as a control section underneath.

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