twopassadj.双行程的(双道的)twonum.二；两个two order statistics二阶统计量two-h rolling mill二辊轧机two-state variable二状态变量two-engine landing双发着陆two-man comedy act两人演的喜剧two stage compressor双级压气机,两级压缩机,二级压缩机,两级压气机two-man cycle polo两人自行车马球Two-Orient Society两型社会two-waves sampling两步抽样two-pulse canceler双脉冲对消器

1. With two straight needles,self-lubricated vertical-axis rotating hook for catching thread looops and sliding cam thread take-up,the machine can producetwo lines of lockstitch.
   本机采用双直针，立式自动加油旋梭勾线，滑杆挑线，构成二行双线锁式线迹。