稀土灰口铸铁高压暖气片
radiator of rare-earth grey cast iron
灰铸铁气焊
Flame welding of gray cast iron
内螺纹外翅片铸铁管
Casting tube with female screw and side fins
内螺纹外肋片铸铁换热管
Cast iron heat exchange tube with inner corrugation and outer fins
铸铁气缸套
Cast iron cylinder liner
cast iron cylinder sleeve
旁管-双暖气片供热技术
bypass and dual-radiators heating technology
(速凝)片铸(SC)工艺
breakdown influence matrix