Laiwu Zhengqi Plastic Machinery Co.,Ltd is professional plastic machinery manufacturer.Our company can research and development,design,manufacture,market and serve.The science and technology plays a leading role in our company.Our company covers an area of 60 mu,workshop area over 20000 sq.m..And we have more than 200 staff,including research staff more than 30 people and senior technician more than 60 people. Our company possesses strong technical strength,gathers many senior industry ...