“concretion”的概念、定义、翻译、参考文献-科学参考

单词	concretion
释义	concretion [kän`krē·shǝn] ^GEOLOGY A hard, compact mass of mineral matter in the pores of sedimentary or fragmental volcanic rock; represents a concentration of a minor constituent of the enclosing rock or of cementing material.
随便看	piston blower piston corer piston displacement piston drill piston engine piston flow piston gage piston head piston meter pistonphone piston pin piston pump piston ring piston rod piston skirt piston speed piston-type area meter piston valve piston viscometer pit pitch pitch acceleration pitch attitude pitch axis pitchblende

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