Electrical power assisted steering (EPAS) is one of the key components, especially for electrical vehicle. It has attrac......

The WHO approves China’s vaccine regulation system The World Health Organization (WHO) said China had complied with int......

目的：探讨胸腔闭式引流术病人手术服的制作及应用效果。方法将170例胸腔闭式引流术患者，随机分为实验组和对照组各85例。对照组患者......