They are all classic old models, which are shared learning. The pictures are all old pictures. I am too lazy to update them in typesetting. They are somewhat vague. Please wait until you are free.

It is also a Zeus style, but it seems to have a good reputation.

It is a famous explosive model in the industry, with simple shape and many imitators, but it seems.... Ha ha ha ha

I am quite optimistic about the shape of this ion meter, but the feedback from the product market is general, which may be too single in function.

Welcome all kinds of product development cooperation and learning exchange vx774093185