自拍偷拍第-成人午夜在线免费观看-欧美日韩性生活视频-久久麻豆av-成人午夜在线观看-国产三级久久久久-奇米影视一区二区-亚洲五码av-91综合国产-日韩欧美91-久久精品一本-久久精品久久精品-一级视频在线-1024国产在线-欧美国产日韩视频-欧美成人第一页

Found in 1982, we Labotrix have a very professional team to design, research and produce all of physics lab equipments for education, like microscopes, electromagnet, optic products, measurement products, electronic products, mechanic products, Lab jack, electroscope, magnet, compass, hand generator, leyden jar, Newton colour disc, optical bench, balance, tuning fork, Van De Graaff Generator, Wimshurst machine, interactive whiteboard, sensor, overhead projector, LCD projector, micrometer, tape measure, stop watch, A-C basic meter, Dual-trace oscilloscope, force table, inclined plane, pulley, collision ball, Loop the Loop, pump, Pascal ball, Magdeburg hemispheres, aneroid barometer, slinky spring, Lenz Law apparatus, cylinder conductor, calorimeter, convection tube, Ring and ball, linear expansion apparatus, spring scale, physical balance, slotted weight

 LABWE Interactive Whiteboard is a revolutionary breakthrough  of classroom whiteboard in the 21 century. It supports th stable and reliable infrared sensor position technology that any non-transparent objects including fingers all can be functioned on the board. Special panel material is used that softly color and large view angle are available, but also there is no bright speckle when(the whiteboard is) projected; in addition, even nomal water-pen can write on the board, which can be easily erased without remnants.