1984年12月14日在重庆大学召开了“气控液压换向阀研究”成果鉴定会,出席鉴定会的有来自37个单位的56名代表。鉴定委员会一致认为,重庆大学机械二系研制的气控液压换向阀是成功的,阀的技术性能先进,如:推力是同类型电磁换向阀的3～5倍,根据需要还可以增大,且推力连续可调,给使用带来很大的方便,并从根本上避免了因电磁铁推力不够而 December 14, 1984 held in Chongqing University, “Pneumatic Control Valve Research” results appraisal meeting, attending the appraisal will have 37 representatives from 56 units. Accreditation Committee agreed that Chongqing University Mechanical Second Series developed pneumatic control valve is successful, the valve of advanced technology, such as: thrust is the same type of electromagnetic valve 3 to 5 times, according to need can also be increased , And the thrust continuously adjustable, to bring great convenience to use and fundamentally avoid the electromagnet thrust enough