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double meshes：双线编网目

double knot; double sheet bend 双重死结节 | double meshes 双线编网目 | double pipe type 套管式[冷冻]

double-point crank press：双点曲轴压力机

double-point breaker 复式断电器 | double-point crank press 双点曲轴压力机 | double-point double-throw switch 双刀双掷开关

double-throw disconnecting switch：双投隔离开关

double-pole double throw switch 双刀双掷开关 | double-throw disconnecting switch 双投隔离开关 | double-throw switch 双投开关; 双掷开关

double hexagon end cap wrench：六角螺帽双头扳手

double end "alligator type "wrench 双头鳄口扳手, 双头管扳手 | double hexagon end cap wrench 六角螺帽双头扳手 | double hexagon opening double offset box socket wrench 双头弯脖梅花扳手

switch; double-pole double-throw：双极双向开关

"switch; double pole","双极开关" | "switch; double-pole double-throw","双极双向开关" | "switch; double-pole single-throw","双极单向开关"

switch; double-pole double-throw：双极双投开关

双极开关 switch, double-pole | 双极双投开关 switch, double-pole double-throw | 双极单投开关 switch, double-pole single-throw

switch; double-pole single-throw：双极单投开关

双极双投开关 switch, double-pole double-throw | 双极单投开关 switch, double-pole single-throw | 双投开关 switch, double-throw

double-point double-throw switch：双刀双掷开关

double-point crank press 双点曲轴压力机 | double-point double-throw switch 双刀双掷开关 | double-point gear 多点啮合齿轮

double-door drop-bottom bucket：对开底卸料斗

double-disk winding ==> 双盘型线圈 | double-door drop-bottom bucket ==> 对开底卸料斗 | double-double effect ==> 双偶效应

double lever safety valve：双杠杆安全阀

double lens 双透镜 | double lever safety valve 双杠杆安全阀 | double lift double cylinder jacquard 复动式双花筒提花机

Camphorwood：香樟

camphor oil 樟脑油 | camphorwood 香樟 | camp process 水泥保护木柱法

platinum resistance thermometer sensor：铂热电阻

plateau,平台;坪 | platinum resistance thermometer sensor,铂热电阻 | playback apparatus,回放仪