... : < 10mg/100gChanglong Group consists of:------Changlong Technologies co., ltd for recycling plastic machinery, PSF machinery and nonwoven equipment ... manufacturing.------Changlong international(CCL Technologies) co., ltd for marine loading arm manufacturing on oil terminal ... API. Our customers include SINOPEC, CNPC, CAOSC, ESSO, SHELL, TOTAL, ArC, ELF, BP, BASF and other brand ...