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double dial telegraph：双面车钟

double diagonal planking 双层斜向外板 | double dial telegraph 双面车钟 | double diamond knot 双花菱形结节

double dial telegraph：双面俥钟

双层甲板 double deck | 双面俥钟 double dial telegraph | 双头冲 double end punch

double dial telegraph：双面通信器

双曲率 double curvature | 双面通信器 double dial telegraph | 两头船 double ender

double slip diamond crossing：復式交分菱形交叉

3103 Double sleeper joint 雙軌枕托接接頭 | 3104 double slip diamond crossing 復式交分菱形交叉 | 3105 Double slip switch 雙交叉轉轍器

Double turnout with diamond crossing：有菱形辙叉的双开道岔

Double traction 双牵引 | Double turnout with diamond crossing 有菱形辙叉的双开道岔 | Double valve seat 双阀座

double diamond knot：双花菱形结节

double dial telegraph 双面车钟 | double diamond knot 双花菱形结节 | double diode 双二极管

double-throw disconnecting switch：双掷隔离开关

double-throw crank-shaft 双弯曲轴 | double-throw disconnecting switch 双掷隔离开关 | double-throw switch 双掷开关

double dot：复附点

double bass 低音提琴 guitar 吉他 | double dot 复附点 | double mordent 复波音

double dot：双符点

105. double counterpoint 复对位法 | 106. double dot 双符点 | 107. double flat 重降、双降

double cap：双大裁

double callipers ==> 双用卡钳 | double cap ==> 双大裁 | double cap insulator ==> 双碗式绝缘子

Apportioned Effort：分摊努力

Applied Direct Costs 实际直接成本 | Apportioned Effort 分摊努力 | Apportioned Task 分摊任务

tussah silk fabric：柞丝绸

tussah silk carpet 柞丝毯 | tussah silk fabric 柞丝绸 | tussah silk fancy yarn 柞粗纺丝