column-reduced standard echelon matrix【计】
【建】 填柱液
column hold-up
暂无补充释义。
column hold-up
暂无补充释义。
column-reduced standard echelon matrix【计】
nonextractable phase open tubular column，NPOT柱
double column plano-milling machine
capillary column deactivation
double column milling machine
single-column vertical borring and turning mill
radial compression column
microbore column column