automatic return trap 自动回水隔汽阀
non-return trap 止回汽水阀
boiler return trap 锅炉回水隔汽具
Trap-neuter-return 捕捉 ; 绝育放养
alternating return trap 反复回水弯
non return trap 止回汽水阀
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While the battle lines are being drawn, the scuttling little monster with the Peter Lorre wheedle leads Frodo and Sam toward a trap in order to steal the Ring before Frodo can finally return the damned thing to Mount Doom.
WSJ: Now That's an Epic
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