伊朗采购需求：石墨环、石墨棒管、石墨转子叶片、膨胀阀、石墨电极、石墨螺栓螺母

I'm looking for a vacuum pump with specific requirements for my project. Could you provide me with details on your available models, including their specifications, performance metrics, and any additional features? Additionally, I need to know about pricing options, lead times, and any potential bulk order discounts. It's important for me to evaluate how your pumps can meet my operational needs, so any documentation or product catalogs you can share would be greatly appreciated. Looking forward to your prompt response!