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International Code of Signals
It seems complicated, but no worry, the Grade 2 examination will only test you some common signals.
LK WONG
Dec 19, 20241 min read
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If others can do it, so can you
åˆ¥äººèƒ½ï¼Œä½ ä¹Ÿèƒ½
LK WONG
Oct 7, 20241 min read
7 views
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