The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found(). ["on loran charts covering areas where sky waves are used","in the Radio Aids to Navigation,PUB 117","in the Loran-C Correction Tables","Sky waves cannot be matched to ground waves in LORAN-C to produce a usable reading"]
二战中,日美航母之间最大的一次海战是哪次海战?
低温法空气分离设备常见的流程有哪几种各有什么特点?
简述给予铁剂的护理重点。
管道系统液压试验合格后气体泄漏性试验前,应进行管道系统吹洗。管道系统吹洗应按经批准的吹洗方案进行。方案应有()等内容。 ["吹洗程序、吹洗方法、吹洗介质、吹洗设备的布置","吹洗介质的压力、流量、流速的操作控制方法","检查方法、合格标准","安全技术措施","监督人员岗位要求"]
世界上出口量最大的潜艇是哪国的?