纤芯直径纖芯直徑

xiān xīn zhí jìng

Meaning

core diameter (of a fiber)

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Characters

纤xiānfine, delicate; tiny, minute纟千芯xīncore, pith; the pith of a rush (Juncus effusus)艹心直zhístraight, vertical; candid, direct, frank十目一径jìngpath, diameter; straight, direct彳又工