CGG油系针状焦
petroleum- based needle coke from CGG
表面改性四针状纳米ZnO
surface-modified ZnO nanotetrapods
补偿针阀
compensation needle valve
补偿针阀调整
compensation needle valve adjustment
超细针状硅灰石短纤维
Superfine acicular datolite short-fiber
粗针状马氏体
coarse acicular martensite
单针筒舌针针织机
single cylinder latch needle machine
弹簧-加载针阀
spring-loaded needle valve