常見(jiàn)例句雙語(yǔ)例句Small amounts of boron were transferred from the electrode to weld metal by adding boron oxide or ferroboron powder to the electrode covering.通過(guò)在焊條藥皮中加入氧化硼或硼鐵向焊縫滲入微量硼。 返回 boron metal powder