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单词
traveling valve
释义
traveling valve
traveling valve
[
′trav·əl·iŋ ′valv
]
(petroleum engineering)
A sucker-rod-pump (oil well) discharge valve that moves with the plunger of a stationary-barrel-type pump, and with the barrel of a traveling-barrel-type pump; contrasted with a standing valve.
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assyrian youth cultural society
assyria on line
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assyriologist
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assyrische mesopotamische vereniging enschede
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assyût
ass’s foot
-ast
ast
ast1
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astab
a stab at
a stab at someone
a stab at something
a stab in the back
a stab in the dark
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更新时间:2025/3/11 22:06:44