-
- HB 2408-1977 HB 243-70AG、BG螺纹塞规及螺纹分组塞规应用尺寸d=3～30mm
- HB 2408-1977
-
- HB 2407-1977 HB 243-70AG、BG螺纹分组塞规d=6～30mm
- HB 2407-1977
-
- HB 2406-1977 HB 243-70AG、BG螺纹分组塞规d=3～5mm
- HB 2406-1977
-
- HB 2405-1977 HB 243-70AG、BG螺纹塞规d=6～30mm
- HB 2405-1977
-
- HB 2404-1977 HB 243-70AG、BG螺纹塞规d=3～5mm
- HB 2404-1977
-
- HB 2403-1977 HB 242-70、HB 243-70螺纹塞规和环规技术条件
- HB 2403-1977
-
- HB 2402-1977 HB 242-70螺纹通瑞环规及其校对塞规应用尺寸
- HB 2402-1977
-
- HB 4-1981-1976 十字槽锥螺纹螺塞
- HB 4-1981-1976