Some manufacturers used a little fumed litharge and basic lead sulfate here also.有些制造厂也用少量细质的一氧化铅和碱式硫酸铝.Litharge itself has been used as a stabilizer.一氧化铅本身就可作稳定剂使用.Red Lead Red lead is made by calcining litharge in a mu...
可以把你的信息或标志印在信纸上。Stationery can be imprinted with your message or logo.所有的指示标志和公告都被译成了英语和西班牙语。All the signs and announcements were rendered in English and Spanish.她在墙上贴满了十二星座的标志。She covered the walls with the signs of the...
He frugally saved various bits of the machine in carefully marked boxes.他厉行节约地把这台机器的各种零件放进仔细标记的盒子里收好。The characteristics of the machine are fully detailed in our brochure.在我们这本小册子里详尽地说明了这台机器的性能.Machine technician can use...