To calculate the appropriate corrosion zone, you must first understand that the etching machine is divided into several sections: one etching machine is divided into four sections: feeding section→corrosion zone→cleaning zone→discharging, and the feeding of the etching machine. The section, the cleaning zone and the discharge section are all fixed, and the price is determined by the length of the corrosion. The length of the corrosion zone is determined by the corrosion time, corrosion yield, and workpiece size.

　　According to the above formula, we have an example. For example, an etching processing factory wants to find an etching machine manufacturer to buy a suitable etching machine. It does not know the price of the etching machine. It only knows that it has a 200*300mm stainless steel plate that needs to be corroded and hollowed out every day. The production of 500 pieces is required for 8 hours, and the thickness of stainless steel plate is 0.3mm. I want to buy one of the most cost-effective etching machines.

　　The size of the stainless steel plate is 200*300mm, so we purchase the conventional 700mm feed width etching machine. The corrosion time of the corrosion rate of 0.3mm in the production of stainless steel is 15 minutes, and the new medicine is faster.