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focus lamp：焦点灯

fluorescent lamp 荧光灯 | focus lamp 焦点灯 | framing indicator lamp 成帧指示灯

pole-control focus lamp：杆控聚光灯

pole-changing relay 换极继电器 | pole-control focus lamp 杆控聚光灯 | pole-reverser 换向器

line focus tube：线性焦点X射线管

line feed 换行,移行 | line focus tube 线性焦点X射线管 | linen measure tape 布带尺

line focus tube：线性焦点

line feed换行,移行 | line focus tube线性焦点 | linen measure tape 布带尺

double focus tube：双焦点(X射线)管

double-ended uterine dilator 双头子宫扩张器 | double focus tube 双焦点(X 射线)管 | double forceps 双头镊(细菌培养用)

double focus tube：双焦点

double-ended uterine dilator双头子宫扩张器 | double focus tube双焦点( | double forceps 双头镊(细菌培养用)

double focus tube：双焦点管

双分裂腔 double fission chamber | 双焦点管 double focus tube | 双聚焦 double focusing

tube focus：管焦点

(X射线)管滤器 tube filter | 管焦点 tube focus | 管渗漏 tube leak

Focus x-ray tube：小焦点X射线管

Film unsharpness 胶片不清晰度 | Focus x-ray tube 小焦点X射线管 | Fine grain intensifying screen 微粒增感屏

small focus X-ray tube：小焦点X射线管

slurry packing 匀浆填充 | small focus X-ray tube 小焦点X射线管 | Smith-McIntyre mud sampler 史密斯-麦金太尔取泥器

dioptric：折射光学的

dioptre 屈光度 | dioptric 折射光学的 | dioptrics 折射光学

Saturdays are fun：星期六很有趣

6. Saturdays are fun.星期六很有趣. | fun 为不可数名词,"快乐,有趣",在此做表语. | That must be fun. 那一定很有趣.