DIN EN ISO 23537-1 E:2021 文件草案 睡袋要求 第1部分:针对 -20 oC 及更高极限温度设计的睡袋的热、质量和尺寸要求 (ISO/DIS 23537-1:2021) 德文版和英文版 prEN ISO 23537-1:2021
Draft Document - Requirements for sleeping bags - Part 1: Thermal, mass and dimensional requirements for sleeping bags designed for limit temperatures of -20 oC and higher (ISO/DIS 23537-1:2021); German and English version prEN ISO 23537-1:2021