... 10 years professional experience, special engineer in charge of quality and model goods in stock Detailed Product DescriptionZCJJ's tower crane ... the procedurerequirements : mill ,plane, polish, press ,test etc in turn. 6,As for have finished products ,we perform the ... integrated pellet ) ,which provided by Sanmen Sangang ,and isdurable in use.( 7 ) Welding : welding is carbon-dioxide shielded and ...