“spool-type roller conveyor”的概念、定义、翻译、参考文献-科学参考

单词	spool-type roller conveyor
释义	spool-type roller conveyor [`spül ¦tīp `rō·lǝr kǝn´vā·ǝr] ^{MECHANICAL ENGINEERING} A type of roller conveyor in which the rolls are of conical or tapered shape with the diameter at the ends of the roll larger than that at the center.
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