在气温低时用多倍仪描图，作业员操作测标台很感冻手，有的甚至把手都冻肿，就是在取暖条件比较好的情况下，也因为金属导热性好，仍然感到是冰凉的。为了改善作业条件，去年冬天我们把全队的多倍仪测标台都安装了一小功率的电热丝。该装置制作简单，安全可靠，效果很好，很受作业员 Multi-times at low temperatures when the picture, the operator operating the test bed is very cold hands, and some even handle are swollen, that is, in the case of better heating conditions, but also because the metal thermal conductivity is good, still feel cold of. In order to improve working conditions, last winter we put the team’s multi-instrument test bed are installed a low-power heating wire. The device is simple, safe and reliable, good effect, very affected by the operator