BS 4660-2000 Thermoplastics ancillary fittings of nominal sizes 110 and 160 for below ground gravityBS 4660-2000 Thermoplastics ancillary fittings of nominal sizes 110 and 160 for below ground gravity drainage and sewerage
部份国外标准涉及版权问题,所以全部国外标准于2013年02月,全部删除!相关页面仅提供参考消息。