突尼斯采购需求：冷轧钢和热轧钢、涂层钢、铁路轨道、型材钢、钢管和钢管材

I'm reaching out to inquire about the galvanized cold rolled steel and white cold rolled steel you offer. We're particularly interested in understanding the various grades and specifications available, as well as the minimum order quantities you require. Additionally, it'd be great to know about your pricing structure and any bulk purchasing discounts you might provide. Furthermore, could you please provide details on your lead times for production and delivery, along with your payment terms? We're keen to establish a reliable sourcing partnership, so any information regarding the quality certifications or testing processes would also be appreciated. Looking forward to your prompt response so we can move ahead quickly!