【机】 心砂

水洗硅砂系列：这是一种经过洗涤、脱泥、分级和表面处理的砂，具有较清洁的原形颗粒，用于铸铁件，中小型铸钢件的型芯砂。

nucleosome core particle

core / non-core assets

three-core power cable with common copper screen

post crown with core

core gateway【计】

core competitiveness

web-roll core with arrangement for securing the ends of filamentary material

dust core (iron-dust core, iron-powder core)