secondary line
短语词组
- Secondary compartment line 区划副线
- Secondary Trunk Line 二干
- secondary geodesic line 二次测地线
- parking secondary brake line 停放紧急制动管路
- secondary sensitivity line 次灵敏线
- secondary spectral line 二级光谱线
- Secondary electron line scanning 二次电子线扫描
- secondary ground line 副基线
- secondary power line carrier 低压电力线载波 返回 secondary line