30 GB 5100-1994 鋼質焊接氣瓶 Welded steel gas cylinders
31 GB/T 5140-1985 叉車 掛鉤型貨叉 術語 Fork lift trucks--Hook-on type fork arms--Vocabulary
32 GB/T 5141-1985 平衡重式叉車 穩定性 基本試驗 Counter balanced lift trucks--Stability--Basic tests
33 GB/T 5142-1985 前移式和插腿式叉車 穩定性試驗 Reach and straddle fork lift trucks--Stability tests
34 GB 5143-1985 高起升車輛護頂架 技術要求和試驗方法 High-lift rider trucks--Overhead guards--Specification and testing
35 GB/T 5182-1996 叉車 貨叉 技術要求和試驗 Fork-lift trucks--Fork arms--Technical characteristics and testing
36 GB/T 5183-1985 叉車貨叉的尺寸 Fork lift trucks--Fork arms--Dimensions
37 GB/T 5184-1996 叉車 掛鉤型貨叉和貨叉架 安裝尺寸 Fork-lift trucks--Hook-on type fork arms and fork arm carriages--Mounting dimensions
38 GB/T 5621-1985 鑿巖機械與氣動工具性能試驗方法 Test methods of performance for rock drilling machines and pneumatic tools
39 GB/T 5656-1994 離心泵技術條件(II類) Technical specifications for centrifugal pumps--Class II
40 GB/T 5657-1995 離心泵技術條件(Ⅲ類) Technical specifications for centrifugal pumps--Class Ⅲ