GB/T 18691.1-2021农业灌溉设备灌溉阀第1部分:通用要求标准
英文:Agricultural irrigation equipment—Irrigation valves—Part 1:General requirements GB/T 18691.1-2021介绍: 国家标准《农业灌溉设备 灌溉阀 ...
英文:Agricultural irrigation equipment—Irrigation valves—Part 1:General requirements GB/T 18691.1-2021介绍: 国家标准《农业灌溉设备 灌溉阀 ...