Determination of prices of city piping gas 管道城市煤气价格的确定
Piped gas supply system 喉管式气体供应系统
Gas installations - mechanical joint with flat gasket for pipes gas installations 燃气装置.管道气体装置用带平垫圈的机械接头
Powered two - wheeled vehicles - measurement method of exhaust tail pipe gases from spark ignition engines 两轮机动车量.火花点火发动机排放
Since 1982 , the government has encouraged the installation of a piped gas supply in new buildings to discourage further growth in the use of lpg cylinders in domestic dwellings 政府自一九八二年开始在新建筑物推行管道输送燃气政策,以抑制瓶装石油气用户数目的进一步增长。