GB/T 452.1-2002.Paper and board identification of machine and cross direction. 1范围 GB/T 452.1规定了纸和纸板...
GB国家标准
GB国家标准
GB国家标准
GB/T 452.1-1989 纸和纸板纵横向的测定法
GB/T 452.1-1989.Paper and board-Identification of machine and cross direction. 1主题内容与适用范囿 GB/T 452.1...