The additive constant of the electro-optical distancemeasuring instrument and the total station instrument are the correction of the survey results using these instruments.
光电测距仪（含全站仪）的加常数是仪器测量结果的改正项目，是仪器检定项目非常重要的一项。
Distinctive courses: calligraphy, brass instruments, piano, electro tone, computer, etc.
特色课：书法、铜管器乐、钢琴、电子琴、计算机等。
The instrument not only has all the functions of ordinary electro-acupuncture instruments, but is also able to perform any acupuncture expert treatment program.
仪器不仅具有一般电针仪的功能，还能执行多种针灸专家治疗程序。
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