印度尼西亚采购需求：井盖、井踏、井盖表面、沟箅、圆形井盖、方形井盖

I'm in search of manholes for an upcoming project and would greatly appreciate your assistance. Could you please provide detailed specifications for the available options you offer? I'm particularly interested in dimensions, materials, load ratings, and any relevant standards that your products meet. A summary of key features would be helpful as well. Additionally, it would be great if you could share your pricing structure, including any bulk order discounts or lead times. This information is crucial for my decision-making process, so any clarity you can provide would be beneficial. Looking forward to your prompt response!