三工。。双工。。单工  triplex-duplex-simplex

手工单工系统  manual simples systme

手工单面焊  one-sided manual welding

手工手套  hand-made gloves and mitts

半双工工作半双向操作  half duplex operation

单／双工混合运行模式  simplex and duplex hybrid operation mode

单工、双半工  simplex， halfduplex; simplex; halfduplex

单面双密度  single sided double density

单面双密度磁盘  single sided double-density diskette

单-双工  single-duplex

单双工转换键  simplex and duplex switch

单双面胶纸  single-double-side offset paper

单双面修理  single-sided and double-sided repair

单位Banach双模  unital Banach bimodule

单箱双室  single box double room

单箱双室连续箱梁  continuous box girder with one box double cells

单箱双室箱梁  single box double room box girder; beam of two houses in one box

单张纸双面单色胶印机  sheet-fed single colour perfector

分离式单箱双室结构  the discrete simple-box double-cell girder

集装箱双面吊  container dual-side loading crane; container dual side-load trailer; Dual side-load trailer