野花韩国中文版免费观看,四虎永久在线精品免费播放,厨房人妻hd中文字幕,贞洁人妻终于被征服

Hotline Hotline:0532-82560806

Bolt type

Bolted connection pair

Bolted connection pair

High strength hexagonal head bolt connection pair GB1228/1229/1230 is used with bolts, nuts and washers. It is often used in steel frames, pipeline brackets, railway bridges, industrial steel structures, etc.

Copyright ? 2019-2022 青島泛易精密五金有限公司 版權所有    魯ICP備18006357號