The hamworthy super trident sewage treatment unit is a self contained system for the treatment of sewage from ships or rigs before it is discharged overboard and so prevent the pollution of harbour and coastal waters and inland waterways 大概意思我知道，就是一个船或钻井上的一个污水处理单元，在污水排放前的独立控制系统，防止港口和沿海水域和国内航道的污染。
