double KTP双KTPdoubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double fillet welded T-joint双面丁字形焊接double nuts anti - loosening双螺母防松double-geared roller crusher双齿辊破碎机double revolving optical fiber并行双回转光纤double glow plasma carbonizing双辉离子渗碳double-layer plate structure双层板壳结构double-wire semaphore signal双导线臂板信号机double coiled spiral structure双螺旋结构double radioisotope derivative双放射性同位素衍生物double-level teachers' teams