泰国采购需求：变频驱动器、变频逆变器、变频器、交流驱动器、变频器制造商、交流伺服驱动器

I'm looking to purchase steel, and I need more details on the various types you offer. Could you provide me with information about the grades, specifications, and available quantities? Additionally, I'm interested in understanding the pricing structure, including any bulk order discounts or shipping costs, so I can make an informed decision. It would be helpful to know the lead times and production capabilities you have, as I'm aiming for a timely delivery for an upcoming project. If you have any certifications or quality assurance processes in place, please share that as well. Looking forward to your prompt response with the requested details!