美国采购需求：聚合物加药系统、筛网和细筛网、气泡扩散器、MBBR介质、纳米气泡发生器、潜水式搅拌器

I'm reaching out to request a preliminary cost estimate for two specific products in your lineup. I'm interested in understanding the pricing structure for these items, including any bulk purchase discounts you might offer. Additionally, it would be great to get an idea of lead times for delivery and any minimum order quantities that apply. Could you also provide details on the materials or specifications involved, as well as any available options or variations? Having this information will greatly help in my budget planning and decision-making process. Looking forward to your response!