IS 3283 : 1966 Dimensions for mushroom ventilators with adjustable head-cast iron type with provision for passage of light
UDC 621.61 : 629.12 | TED 17 |
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Reaffirmed 2022 |
1 Scope
1.1 This standard specifies the dimensions for mushroomventilators with adjustable head - cast iron type, with provisionfor passage of light.