Based on the practical experience in library work automation, the author summarises some backup methods for avoiding data loss of ILAS.
根据图书工作自动化的实际经验，作者总结了避免ILAS数据丢失的某些方法。
The drawing method and principle of radar chart with iso beam height (radar range chart) were described based on the practical experience.
结合实践经验，详细介绍了雷达等射束高度图（也称为雷达有效地理视距图）制作的原理和方法。
Based on the practical experience and relevant reference, one approximate method for calculating the seal plate of plate bundle was presented as well.
笔者通过对产品开发的生产实践，参照有关资料，提出解决板束封板设计计算的近似计算方法。
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