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 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 21600-2014
椭圆快开衬不锈钢人孔(附条文说明)
Lining stainless steel elliptic quick opening manholes
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