AC-B

Magnetic inspection of 300M steel raw material for its purity was carried out with magnetization specifications chosen from B-H, Br-H and μ-H curves by comparative test of AC and DC magnetizations.

介绍了按B-H、B r-H、μ-H曲线所选定的磁化规范，用交、直流磁化对比试验，对300M钢原材料纯洁度进行磁粉检验的方法。

Three polysaccharides AC-A, AC-B, AC-C were isolated and purified from the water extract of the root of Cynanchum auriculatum. The molecular weight of AC-A, AC-B and AC-C were 28000, 51000 and 117000 respectively.

从萝（？）科植物耳叶牛皮消根水提液中分离得到三种杂多糖AC-A，AC-B，AC-C，分子量分别为2800051000117000。

B: These are for one hundred volts, AC and DC.

这些适用一百伏特的电压，交流电和直流电都可以。