VII
... VII 粘度指数改进剂 VM 粘度改进剂 ZDDP 二烷基二硫代磷酸锌 ...
[助剂] viscosity index improver
... VHVI Very High Viscosity Index 很高粘度指数 VII Viscosity Index Improver 粘度指数改进剂 VM Viscosity Modifier 粘度改进剂 ...
Viscosity number improving agent