单项选择题
A.a short length of heavy duty clear plastic tubing
B.a length of approved flexible nonmetallic hose
C.welded flange connections for all joints
D.aluminum piping with expansion loops
单项选择题 When the prime movers of two paralleled generators are equipped with mechanical- hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will （）.
单项选择题 Diesel engine jacket water is used in the distillation process as the （）.
单项选择题 The replacement piping for diesel engine high pressure fuel systems must be the same length and diameter as the original piping to （）.