碱基替换

Supplier base

silica matrix,silica base,silica-based

printed wiring board layered product as a base material

base clamp for steep-curler for hairdressing

color composite plating with nickel base and fluorescent pigment

bimolecular elimination through the conjugate base; 代号E2cB。

collector-base leakage【电子】

invar base measuring apparatus【测】