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
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
多节钩针针织机
multisection spring needle machine
改良输尿管镜针状电刀
self-made micro-probe electrotome
管针针织机
tubular-needle knitting machine