l assessment, the confirmation of\rqualified before the job..\rYour answer: no answer, the correct answer: 6 months\r18 9 in lifting operations, the lifting and laying of\runderground or heavy objects on the ground are forbidden and\rhoisted.\rYour answer: no answer, the correct answer: oblique, obiique\rhanging\r19, there are many methods for lifting without anchor points.\rTheir common point is that the movement of the device can be\rused to achieve the purpose of hoisting.\rYour answer: no answer, the correct answer: self balancing\r20, artificially lowering the water table should continue until\rafter backfilling.\rYour answer: no answer, the correct answer: the basic project\ris completed
全文预览