Big bend
Tee in dif…
Cross the …
顺水三通
45°弯头
S型弯
异径直通
异径三通
三通
弯头
直通
Herringbon…
Backwater …
stop valve
Water five
Inside the…
The teeth …
straight t…
Three-dime…
Water six …
S-bend pip…
Well tee
等径三通
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