I want to buy some automatism valve,for example electric valve,motorized valve,Pneumatic Valve,but i can not know which valve i should to bay ,who can tell me the point about these electric valve,motorized valve,Pneumatic Valve,if you can tell me these,I very thanks,or you can visit http://www.electric-valves.cn
问题描述：
I want to buy some automatism valve,for example electric valve,motorized valve,Pneumatic Valve,but i can not know which valve i should to bay ,who can tell me the point about these electric valve,motorized valve,Pneumatic Valve,if you can tell me these,I very thanks,or you can visit
http://www.electric-valves.cn
答
其实他们的区别太 复杂了