Effect of a rapeseed oil derived pour point depressant on the flow properties of the waxy oil from Changqing OilfieldYongzhen Wang, Guibin Liu, Xiaoyu Zhou, Qingzhu Zhng, Wei Jiang, Chuanghui Han, Sitong Huo, Yubo Lian and Sanbao DongE3S Web Conf., 329 (2021) 01051DOI: https://doi.org/10.1051/e3sconf/202132901051