... more hard.I am the cleaner of my family,i m in charge of cleaning the waste,they call me ... have an e xcellent effect. Shhhhhhhh,i am in charge of the final product,crude oil,at my whole ... and pressure guage,safety valve and auto alarm,in case of something wrong happen,we can take action immediately. ... Q:How many kinds of machine Zhongli have?A:In usual,we have two,the biggest ...