A、<span style="font-size:16px;font-family:宋体">弹簧管 </span>
B、<span style="font-size:16px;font-family:宋体">孔板 </span>
C、<span style="font-size:16px;font-family:宋体">喷嘴 </span>
D、<span style="font-size:16px;font-family:宋体">文丘里管 </span>
E、<span style="font-size:16px;font-family:宋体">波纹管</span>
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