精品文献
沟槽式软密封蝶阀(蜗轮)
VBS软密封蝶阀说明书(英文)
? Instruction Manual VBS Soft Seal Butterfly Valve Chuanyi Instrument No.11 Factory Co., Ltd. Chongqing VBS Soft Seal Butterfly Valve １ 1、summarization VBS pneumatic soft seal butterfly valve is the new generation of high performance quality product which assembled by pneumatic actuator and double eccentric high performance butterfly valve. It has fine cut-off function and lasting quality, a