越南采购需求：自动菌落计数器，气溶胶光度计，THC分析仪FID，尘埃粒子计数器

I'm looking to purchase isokinetic equipment and would like more detailed information about your available products. Specifically, I'm interested in understanding the features, pricing, and any bulk order discounts you might offer. Additionally, it would be great to know about the lead times for orders and your return policy. If you have any catalogs or brochures that outline your offerings, please share them with me. This info will help me make an informed decision. Looking forward to your reply!