“pall ring”的概念、定义、翻译、参考文献-科学参考

单词	pall ring
释义	pall ring [`pȯl ´riŋ] ^{CHEMICAL ENGINEERING} A specially shaped steel ring used as packing for distillation columns.
随便看	square-jaw clutch square joint square key square-law demodulator square-law detector square-loop ferrite square matrix square mesh squareness ratio square-nose bit square number square-on square planar molecule square root square-root law square-root transformation square search square-serif type square set square-set block caving square-set stopes square thread square wave square-wave amplifier square-wave generator

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