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(d)double drum dryer with spray feed：喷洒加料式双滚筒干燥器

(c)double drum dryer with splash feed飞溅布料式双滚筒干燥器 | (d)double drum dryer with spray feed喷洒加料式双滚筒干燥器 | (e)vacuum double drum dryer 双滚筒真空干燥器

double cage type mechanical drum washer：双笼式机械洗桶机

double cable winch 双索卷扬机 | double cage type mechanical drum washer 双笼式机械洗桶机 | double cage type motor 双鼠笼式电动机

double tariff electricity meter：二部电价制电度计,双价电度表

"double T steel ","H形钢,工字钢" | "double tariff electricity meter ","二部电价制电度计,双价电度表" | "double tariff meter ","二部电价制电度表"

double wedge airfoils：双楔翼型

double wave detection || 全波检波 | double wedge airfoils || 双楔翼型 | double wing spar || 双翼梁

double plate for anodes：阳极包板/垫板

double groove 双面坡口 | double plate for anodes 阳极包板/垫板 | double probe method 双探头法

double armouring：复式钢筋

double angle 双角钢 | double armouring 复式钢筋 | double batten 双重板条

double-post bollards：双柱缆桩

double-post bollard 双柱带缆桩 | double-post bollards 双柱缆桩 | double-pressure boiler 双路循环式锅炉

double overhead camshafts：双顶置凸轮轴

double-filament (灯泡)双丝的 | double overhead camshafts 双顶置凸轮轴 | double-plate clutch 双盘式离合器

double overhead camshafts：双顶置凸轮妯

double-filament (灯泡)双丝的 | double overhead camshafts 双顶置凸轮妯 | double-tee 工[双丁]字形的

double divied press：双分配压榨

double disc refiner 双动盘磨机;双盘磨 | double divied press 双分配压榨 | double drum reel 双鼓卷纸机

propanone oxime：丙酮肟

propanone hydrogensulphite丙酮合亞硫酸氫鹽 | propanone oxime丙酮肟 | propanoyl chloride丙酰氯

underweight：不合标准的重量重量不足的

underway 在航在航的 | underweight 不合标准的重量重量不足的 | underwirter's guarantee 保险人保证书