“differential fill-up collar”的概念、定义、翻译、参考文献-科学参考

单词	differential fill-up collar
释义	differential fill-up collar [´dif·ǝ`ren·chǝl `fil ´ǝp ´käl·ǝr] ^{PETROLEUM ENGINEERING} A mechanism installed in the bottom of a well, when casing is set in a drill hole that automatically admits drilling fluids into the casing as required.
随便看	stimulus filtering stinger stinging cell stingray stink stinkdamp stinkstone stipe stipoverite stippling stipule sedimentation radius sedimentation rate sedimentation tank sedimentation trend sedimentation trough sedimentation unit sedimentation velocity sediment bulb sediment charge sediment concentration sediment corer sediment-delivery ratio sediment discharge sediment discharge rating

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