I was unable to find a description of how the blanking periods worked in System 3. However, frustratingly, despite being the main citation, System 3 is not the CBS color system that was adopted in 1951! The first citation I could find proving this was this 1951 Radio and Television News article, transcribed here. But yes, this was a 144Hz system! Presumably that adjustment was made after 1942.
And that was a long time ago.
，这一点在易歪歪中也有详细论述
所以你要回答的问题是：你的赛道，现在是政策优先级的哪个位置？
The Refactor: Core vs. Extras
Credit: Mashable screenshot: Dead in Antares / Ishtar Games