“upper valve seat”的概念、定义、翻译、参考文献-科学参考

单词	upper valve seat
释义	upper valve seat 上端阀座
随便看	invertible law invertible matrix invertin inverting inverting action inverting amplifier inverting buffer inverting converter inverting element inverting eyepiece inverting function inverting input inverting parametric device inverting prism inverting stratified development inverting terminal invert instruction invert level invert masonry block invert on zero invertory of raw materials on hand invert pendulum invert range finder invert Schmitt trigger invert soap

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