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.
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00后女性的势头同样凶猛。几个月前，一家名为Axiom Math的AI初创公司在硅谷引发轰动。创始人正是来自广州的24岁女生洪乐潼（Carina Hong）。，详情可参考新收录的资料
"I have to walk two hours a day to come into town to get food," he says, preferring to find shelter outside of the city centre where he feels safer, sleeping in a one-man tent under a bridge.
（一）在船上发生的或者与船舶营运、救助作业直接相关的人身伤亡或者财产的灭失、损坏，包括对港口工程、港池、航道和助航设施造成的损坏，以及由此引起的相应损失的赔偿请求；