芯

阀芯

fá xīn

valve stem

电芯

diàn xīn

battery cell

龙芯

lóng xīn

Loongson (a family of general-purpose CPUs developed within China)

反应堆芯

fǎn yìng duī xīn

reactor core

堆芯

duī xīn

reactor core

燃料芯块

rán liào xīn kuài

fuel pellets

滤芯

lǜ xīn

filter cartridge

灯芯

dēng xīn

variant of 燈心|灯心[deng1 xin1]

灯芯绒

dēng xīn róng

(textiles) corduroy

灯芯草

dēng xīn cǎo

see 燈心草|灯心草[deng1 xin1 cao3]

笔芯

bǐ xīn

pencil lead; pen refill

纤芯

xiān xīn

core (of a fiber)