back wool

进出口专业英语词汇_专业词汇_专业英语... ... back wave tube 返波管 back wool 背部毛 back-acting shovel 反铲铲土机 ...

"长度单位_馆档网 ... "重绕"," back winding" "脊背毛"," back wool" "棚经梁;后梁"," back-bearer" ...