所谓教学投影仪又称微型投影仪、教师投影仪、掌上投影仪，TRT-3M便携式投影机，主要通过3M LCOS RGB三色投影光机和720P片解码技术，把传统庞大的投影机精 巧化、便携化、微小化、娱乐化、实用化，使投影技术更加贴近生活和娱乐。
制作欧姆表透射投影教具，可便于结合投影仪进行欧姆表测量原理的教学。
Making transmission projection experimental realia of Ohmmeter is convenient for teaching Ohm-meter measurement principle with the aid of projector.
J01460投影电流表适用于普通中学、中专配合投影仪在进行教学演示或实验时测量直流电路中的电流强度。
Projection Ammeter, J01460, is suitable for middle schools and polytechnic schools to measure current intensity in the DC circuit in teaching demonstration or experiment with the projector.
投影仪作为一种重要的办公设备，已经广泛的应用到了军事、教学、企业等多种部门。
As a important equipment of office which has been put in use in military affairs, education, companies, etc.
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