wall coating短语¹⁴⁴⁹⁷²⁺² 基本例句 壁镀层,墙面涂料,墙壁漆 The laboratory evaluation method and apparatuses on drag reduction, viscosity reduction and anti- wax for the internal wall coating and additives of pipeline of crude oil were summarized. 随着人们对原油减阻防蜡研究的深入，实验室评价装置和性能测试方法也将进一步得到完善和发展。 cnki