Medium frequency transformer quenching is used for workpiece diathermy, quenching, annealing, brazing, etc.中频淬火变压器用于工件的透热 、 淬火 、 退火 、 弯管钎焊等工艺.sample workpiece样件, 样品Light - vehicle headlamp reflector is constituted of par...
清晨鸟叫得最欢.Birds sing loudest in the early morning.飞机已准备好, 引擎发动起来象鸟叫一样动听.The kite's all ready, and the engine's as sweet as a bird.几码路开外的树林中,一只鸟叫了起来, 昆虫也乱叫了起来.From the trees a few yards away a bird called once, an...