沙特阿拉伯采购需求：潜水泵、排水泵、水下泵、离心泵、电动水泵、消防泵

I'm looking for a complete sewage pump specifically designed for marine applications, featuring self-priming capabilities and the ability to handle rough conditions. It should be tough against corrosion and able to manage solid waste efficiently. Additionally, I need a high-efficiency centrifugal pump for marine engine preheating systems. This pump must ensure smooth coolant circulation to keep the engine ready for immediate use, preventing any cold start issues. Please provide detailed specs and pricing for both items.