久久这里只有精品66,色戒电影在线完整版,日本丰满大白屁hd,一本色道久久综合狠狠躁篇适合什么人看,伊人影院中文字幕,亚洲日本香蕉视频,超碰啪啪

Electronic scale city with a lot of people, scientific use of electronic scale will bring you a lot of convenient, to the following introduction about electronic scale using little skill:

(1) using/counter scale should be arranged in secure must level off (put), four feet steady, so much will make according to the weight is correct.

(2) the first to use every day, boot after preheating first few minutes, inspect whether the loss of electricity, test whether scale motor solid.

(3) reasonable choice using precision, because of, can make the performance is not stable, high precision best use of the factory set value.

(4) using the high precision balance, and each change position must be held to calibration, what degree should be solid, manipulation.

(5) any balance in calibration "junjun, should be" turned off ", and then in the "restart" rear.