HG/T 21535-2014
回转盖快开手孔
Quick open handholes with hinged cover
2014-07-09
HG/T 21527-2014
回转拱盖快开人孔
Quick open manholes with hinged dome cover
2014-07-09
HG/T 21603-2014
回转盖快开衬不锈钢手孔(附条文说明)
Lining stainless steel rotary cover quick opening manholes
2014-07-09
HG/T 21526-2014
椭圆形回转盖快开人孔
Elliptical quick open manholes with hinged cover
2014-07-09
HG/T 21534-2014
旋柄快开手孔
Quick open handholes with rotating handle
2014-07-09
HG/T 21533-2014
常压快开手孔
Quick open handholes for atmospheric use
2014-07-09
HG/T 2145.3-2015
搪玻璃快开手孔
Quick-opening handhole for glass-lined vessel
2015-07-14
HG/T 21597-2014
回转拱盖快开衬不锈钢人孔(附条文说明)
Lining stainless steel rotary arch cover of quick opening manholes
2014-07-09
HG/T 2145.4-2015
搪玻璃带视镜快开手孔
Quick-opening handhole with glass sight for glass-lined vessel
2015-07-14
HG/T 21532-2014
回转盖带颈对焊法兰手孔
Welding neck flange handholes with hinged cover
2014-07-09
HG/T 21604-2014
旋柄快开衬不锈钢手孔(附条文说明)
Lining stainless steel swing-type quick opening manholes
2014-07-09