马来西亚采购需求：空中救援三脚架，impa 590609，气动伤亡绞盘，气动救援三脚架，气动三脚架伤亡绞盘，ct59-气动和电动工具

I'm interested in a pneumatic tripod casualty winch designed for heavy lifting. Specifically, I'm looking for a model with a lift capacity around 250KGS and that operates effectively at an air pressure of 6-7 bar. Additionally, I'm keen on understanding the winch's performance in terms of speed—ideally, I'd like to know if it can achieve rates close to 20 meters per minute. Please provide details about pricing, available specifications, and any additional features that would be beneficial for my requirements. Looking forward to your prompt response!