The paper introduced the technical progress in air curing fluorinated polyurethane coatings.介绍了常温固化含氟聚氨酯涂料的研究进展.Meanwhile , fluorinated acrylate latexes performed better based on present experimental parameters.三种材料中, 含氟...
A police clampdown on car thieves hit a snag when villains stole one of their cars.警方打击偷车贼的行动遭遇了一点小挫折：匪徒偷走了一辆警车。The school deals exclusively with children of high academic ability. There is a snag though, it costs £9,600...