吊车、消防车、钻探车等从事专门作业的车辆使用10年。
For cranes, fire engines, drilling vehicle and other vehicles engaged in special operations, the standard usage life is 10 years.
从事特种作业的劳动者必须经过专门培训并取得特种作业资格。
Workers engaging in special operations shall receive special training to acquire the required qualifications.
学生在收音机或电视上收听了专门的授课节目之后,也必须把指定的作业寄出,通过函授批改订正。
After special lectures on radio or television, these students, too, have to send set work for correction by correspondence.
应用推荐