1. When compulsory concrete mixer is mixing mobile diesel concrete mixer, optional stop working is forbidden. If an accident happens, users should firstly close electric source and then open the discharging door and discharge 50% of materials.Henan Daswell Machinery Co., Ltd,is a professional manufacturer and trader specializing in the research, development and production of construction machinery for nearly 30 years. Our main products are as follows:Mobile Hollow Brick Making Machine,commercial concrete batching plant,mobile batch plant concrete,etc. We will provide you with the best product and service. 2. After using compulsory concrete mixer, users must clean up the compulsory concrete mixer. 3. After the hopper being lifted, people are not allowed walking under the hopper.