High school, college or industry courses in crane operating are usually required.
或者通常需要高中，大学或行业起重机操作课程。
If you attend a small school you might be operating at a slight disadvantage.
如果你的学校较小，这方面可能略有劣势。
Size and efficiency are two important data to measure the operating quality of a school.
办学规模和办学效益是衡量一所学校办学质量的两个重要指标。
Size and efficiency are two important data to measure the operating quality of a school.
办学规模和办学效益是衡量一所学校办学质量的两个重要指标。
应用推荐