美国采购需求：超声诊断系统、多普勒超声、黑白超声、兽用超声、二维/三维超声

I'm reaching out to inquire about the pricing for your range of ultrasound machines, specifically the 3D, 4D, and 5D models. I'm interested in understanding the features and any variations you might offer within these categories. It would be great to receive a detailed breakdown of the pricing options, including any bulk purchase discounts or promotional offers you may currently have. Additionally, if you could share information regarding warranty, after-sales support, and delivery timelines, that would be really helpful. This will assist me in making a more informed decision as I explore options for these advanced ultrasound technologies. Looking forward to your prompt response!