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双向存储开关 ovonic memory switch;
双向宽带通路 both-way broadband channel;
双向对流 bilateral flow;
双向展开法 two-dimensional development method;
双向开关 two-way switch; bidirectional switch; change-over switch;
双向开关元件 bilateral switching element;
双向开关半导体器件 ovonics;
双向影线 cross hatch;
双向总线 bidirectional bus;
双向报键 bug key;
双向拉伸机 biaxial orientation stretching machine;
双向拉伸薄膜 biaxially oriented film;
双向换能器 bidirectional transducer; bilateral transducer;
双向排水 double drainage;
双向探查 double direction detection;
双向搜索 bidirectional research;
双向摆动门 double swing door;
双向操作 bidirectional operation;
双向无线电通信系统 two-way radio system;
双向晶体管 bidirectional transistor;
双向木楔法 counter wedging;
双向权衡 bilateral weighting;
双向板 two-way slab;
双向树 undirected tree;
双向检波器 dual detector;
双向水流 bimodal current;
双向流(程) bidirectional flow;
双向测向[角]计 double goniometer;
双向灰色梯级 cross-gamma scale;
双向特性 bidirectional characteristic;
双向犁 hillside plough; swivel plough;
双向电动机 {电工} reversing motor;
双向电流 bidirectional current; duo-directional-current;
双向电流法 double current method;
双向电视 two-way television;
双向电视中继系统 two-way television relay system;
双向电话 two-way telephone;
双向电路 two-way circuit; both-way circuit; bilateral circuit;
双向直线步进电动机 two-direction linear stepping motor;
双向离子变频器 cycloinverter;
双向箝位电路 two-way clamp;
双向继电器 bidirectional relay;
双向网络 bilateral network;
双向耦合器 bidirectional coupler;
双向聚焦 double-directional focus(s)ing;
双向脉冲 bidirectional pulse;
双向脉冲序列 bidirectional pulse train;
双向计数器 bidirectional counter;
双向距离显示器 back-by-back display;
双向轨制
双向转换 bilateral switching;
双向转换开关 two-way reversing switch; two-way switch;
双向选择制度
双向通信 two-way communication;
双向通道 duplex channel; two-wire channel; two-way channel;
双向通量 bidirectional flux;
双向逼近法 undirectional approach;
双向采煤 bidirectional cutting;
双向采煤机 bidirectional shearer;
双向锁 reversible lock;
双向锁簧 crossbolt;
双向门 bidirectional gate;
双向队列 dique;
双向阻抗 bilateral impedance
双向限幅 double limiting;
双向限幅器 slicer;
双向风向标 bivane;
双向飞碟射击 skeet shooting;
双向馈电 two way feed;
双吸收
双吸泵
双吸移管
双周刊
双响
双唇音
双唇齿音
双喜
双喜临门
双因素理论
双因贸易条件
双圈饼干
双地址
双堆法
双声
双声源
双声道
双声道磁带录声机 {工声} dual-track tape recorder; double-track tape recorder; half-track tape recorder;
双声道立体声 stereophony;
双声道立体声收音机 stereo receiver
双多倍体
双多倍性
双多面型
双大裁
双头
双头假捻变形 duo-twist texturing;
双头卡规 double-end snap gauge;
双头垄断 duopoly （即市场某一商品由两家卖主垄断）;
双头式 bullhead;
双头接点 twin contact;
双头泵 bull pump;
双头畸胎 dicranus; craniodidymus; bicephalus; dicephalus;
双头蜗杆 double-thread worm;
双头螺丝钉 dowel screw;
双头螺栓 stud;
双头螺纹 double threaded (screw); stud bolt;
双头针 double-ended needle
双头镗床 double-ended boring machine;
双姓
双子叶树
双子叶树材 dicotyledonous wood
双子叶植物
双子宫
双子座
双子座U型（变）星 U Gem star
双子座流星群 Geminids;
双子星座
双子星座燃料电池 Gemini fuel cell
双子星座航天雷达 spaceborne radar for Gemini;
双子星座飞船交会雷达 Gemini spacecraft rendezvous radar;
双孔
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