doubling plate
... doubling of frequency 倍频 doubling plate 复板,加强板 doubling register 倍增寄存器 ...
doubler
... doubler倍压器 doubler复板 doubler复板倍压器 ...
Douler
... Frame肋骨,框架 Douler复板 Coaming(舱口)围板,缘材 ...
sheath
... Sharp freezing room 急冻间 sheath 外壳,复板,外套 Sheathe 覆盖,装鞘,包,套 ...