51精品免费视频国产专区_日韩久久精品不卡一区二区_国产91在线拍偷自偷无码_中文字幕高清无码免费_四房色播开心网_亚洲精品成a人在线观看_少妇作爱视频在线看_国产作爱视频免费播放麻豆_AV天堂永久资源防屏蔽网址_日韩三区在线观看

SkypeQQFInWhatAPPOAMail
XJS900
XJS900XJS900
XJS900

Infinity color corrected optical system with high quality micro-technique presents super excellent micro-image at any observation. Wide-field high eye-point eyepieces and plan /achromatic objectives make the effect of observation more perfect. Anti-Fungus Optical System. Outstanding appearance design and ergonomics structure design long time use without feeling tired. With the design of security lock and safe limits it is much more secure stab- le. and can be kept for long. Various microscopic examinations can be fulfilled such as bright-field dark-field phase contrast fluorescence simple polarizing and so on.