ancillary fitting meaning in English

辅助配件

Pvc - u . 1 : plastics piping systems for non - pressure underground drainage and sewerage - unplasticized poly vinyl chloride , polypropylene and polyethylene - specifications for ancillary fittings including shallow inspection chambers
无压力地下排水和排污用塑料管道系统.未增塑聚氯乙烯
Pvc - u . 1 : plastics piping systems for non - pressure underground drainage and sewerage - unplasticized poly vinyl chloride , polypropylene and polyethylene - part 1 : specifications for ancillary fittings including shallow inspection chambers
无压力地下排水和排污用塑料管道系统.未增塑聚氯乙烯