single tee三通管singleadj.单一的；单个的；特指某人或某物；单身的；单人的；单程的n.单程票；单曲；单人房间；单身者；<美>一元纸币；(网球)单打比赛；(板球)一分打；(棒球)一垒打v.挑选(一个)single line slaughter单线屠宰single view metrology单视测量single-wheel pulley单轮钩式滑车Single stage crossbar单级交叉开关single-acting relay单侧作用继动器Single / unmarried未婚single-axis control单轴控制single-shot booster单作用增压器single star simulator单星模拟器single-offset joint单曲接合杆