hydrocrack
1. Keywords hydrocrack;high-pressure valve;valve body;valve stem;seal surface;
加氢裂化;高压阀门;阀体;阀杆;密封面;
2. Keywords ubricating oil;hydrocrack;catalytic dewaxing;isodewaxing;combination flow;
润滑油;加氢裂化;催化脱蜡;异构脱蜡;联合流程;