美国采购需求：中国真空吊运机和悬臂起重机

We are actively seeking a vacuum sheet steel lifter with a minimum capacity of 1250 lbs. The unit should be powered by DC and come with a spare battery for enhanced reliability. It needs to be versatile enough to handle sheet sizes ranging from 3' x 4' to 5' x 10'. This equipment will be used in our community college welding program, so it should meet the educational demands of our students. Please provide a detailed quote excluding sales tax. Once selected, we will ensure that all necessary tax-exempt paperwork is provided for your records. We're looking for a supplier who can meet our needs effectively and look forward to your prompt response to this inquiry. Thank you!