汽缸法兰紧固螺栓
fastening bolts of casing flanges
汽缸法兰螺栓加热装置
cylinder flange heating appliance
合成蒸汽汽缸油
synthetic steam cylinder oil
缸盖螺栓螺纹
cylinder head bolt thread
head bolt thread
转向油缸连接杆螺栓螺母
steering cylinder tie rod bolt nut
镀锌六角螺栓螺帽
galvanized mild steel hexagonal bolt and nut
镀锌瓦楞螺栓螺帽
galvanized mild steel roofing bolt and nut