【化】双面U型坡口

double U-groove

暂无补充释义。

相关词条

the Double Ninth Festival;Chongyang Festival

Double-Seventh Day；The Double Seventh Festival

double garage

double oblique shade bracket light

double column plano-milling machine

double bar

double-sideband suppressed-carrier modulator【通信】

coincidence double-picture measuring attachment【计】