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| Y-axis Y轴 | Y-bend Y形管 | Y-connection Y形接法 |
| Y-coordinate Y坐标 | Y-cut crystal Y切割晶体 | Y-grid Y形格网 |
| Y-joint Y形接头，叉形接头 | Y-level Y式水平仪 | Y-line Y轴，Y线 |
| y-tilt Y倾角 | YA garnet 钇铝石榴石 | YA laser 铝酸钇激光器 |
| YAG laser 钇铝石榴石激光器 | YAG Laser Crystals 激光晶体 (YAG) | YAG Laser Medical Systems YAG激光医疗系统 |
| YAG Laser Processing Equipment for Joining YAG激光加工机(焊接加工用) | YAG Laser Processing Equipment for Marking YAG激光加工机(标记用) | YAG Laser Processing Equipment for Removal YAG激光加工机(切割加工用) |
| YAG Laser Processing Equipment for Scribing YAG激光加工机(铭刻用) | YAG Laser Processing Equipment for Semiconductor Lithorgraphy YAG激光加工机 | YAG Laser Processing Equipment for Semiconductor Trimming YAG激光加工机 |
| YAG Laser Processing Equipment for Surface Treatment YAG激光加工机(表面处 | yard 码（=0.9144米） | yardstick 码尺 |
| yaw （1）偏航（2）偏转 | yellow 黄色[的] | yellow brass 黄铜 |
| yellow filter 黄滤色镜 | yellow heat 黄热 | yellow ochre 赭黄 |
| yellow sodium light 黄色钠光 | yellow spot 黄斑 | yellow wax 黄蜡 |
| yellowish 淡黄的，带黄色的 | yellowness index 黄度指数 | Yerkes objective 约克物镜 |
| Yerkes Observatory 钓克天文台 | Yga garnet 钇镓石榴石 | yield （1）屈服（2）产额 |
| yield of radiation 辐射强度 | yield point 屈服点 | yielding rubber 缓冲橡皮 |
| YLF Laser Crystals 激光晶体(YLF) | YLF Lasers YLF激光 | yoke （1）架，座（2）轭（3）偏输线圈 |
| yoke axle 轭轴 | yoke ring 轭环 | Young Construction 杨氏结构 |
| Young s Modulus 杨格模量；杨格系数 | Young s Two-Slit Interference 杨格双狭缝干涉 | Young's diffraction theory 杨氏衍射理论 |
| Young's double slit experiment 杨氏双缝实验 | Young's eriometer 杨氏[晕环]测微径计 | Young's experiment 杨氏实验 |
| Young's interference fringes 杨氏干涉条纹 | Young's modulus 杨氏模量 | Young's two-slit interferometer 杨氏双缝干涉仪 |
| Young-Thollon prism monochromator 杨氏-托龙棱镜单色仪 | ytterbium (Yb) 镱 | ytterbium gallium garnet 镱镓石榴石 |
| ytterbium glass laser 镱玻璃激光器 | yttrium (Y) 钇 | yttrium aluminate laser 铝酸钇激光器 |
| yttrium aluminitum garnet 钇 |
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