随机对照试验，比较牙齿复合树脂和汞齐充填恒久后牙的效果。
Randomized controlled trials comparing dental resin composites with dental amalgams in permanent posterior teeth.
对不同鞋面革、鞋里材料单层和复合试样的透气性及其测试的随机性进行了试验研究。
The air permeability and the randomness of air permeability test of different shoe upper leather, shoe lining single -layer material and compounded samples were studied.
应用推荐