哥伦比亚采购需求：黑白超声波、彩色多普勒超声波、心电图、数字X光、病人监护仪

I'm reaching out to inquire about your black color options. I'm particularly interested in both the materials and finishes available for this color. Could you please provide details on the various shades and any specific treatments or coatings you offer? Additionally, I'd like to know about your minimum order quantities and lead times for production. Are there any sample options available? It would be great to understand how quickly you can fulfill orders and if you have any ongoing promotions or deals for bulk purchases. Looking forward to your prompt response!