In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.<br>A:Globe valve<br>B:Butterfly valve<br>C:Gate valve<br>D:Packless valve

In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.
A:Globe valve
B:Butterfly valve
C:Gate valve
D:Packless valve

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