工业工程屋面防水监理实施细则——(2)、屋面保温层质量 ①、保温层材料的堆积密度或表观密度、导热系数以及板材的强度、吸水率必须符合设计要求。 ②、保温层的含水率必须符合设计要求。 …… (3)、卷材防水层质量 ①、卷材防水层所用...
USB 2.0 Specification Engineering Change Notice (ECN) #1: Mini-B connector Date: 10/20/2000 Reason for ECN: The USB 2.0 specified device-side connector – the B connector – is too large for use with a new generation of handheld and mobile devices, e.g., cell phones which would benefit from connectivity to the PC. This ECN incorporates a specification of a device-side mini connector (hereafter r