The classification, functions, basic requirements and the common failures and hitches of the submersibles survecl for drilling rigs are introduced in this paper.
钻井平台服务潜水器的分类、功能、基本性能要求及常见故障。
Refrigerating systems and heat pumps - Safety and environmental requirements - Part 1: Basic requirements. definitions. classification and selection criteria.
制冷系统和加热泵规范。安全性和环境要求：。基本要求、定义、分类和选择规范。
Refrigerating systems and heat pumps - Safety and environmental requirements - Part 1: Basic requirements. definitions. classification and selection criteria.
制冷系统和加热泵规范。安全性和环境要求：。基本要求、定义、分类和选择规范。
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