Hardly. Chin Na is the grasping and locking side of Chinese martial arts; indeed, traditionally, all Chinese arts have had some Chin Na in them. However, the throwing aspect went under a different name (Shuai).
Since Judo has dozens of throws, those wouldn't be included in Chin Na. With that being said, Chin Na techniques differ greatly from what's generally taught in Judo. For example, Chin Na emphasizes standing locks, while Judo focuses on ground grappling.
I don't recall much in the way of Judo's pinning techniques (Osaewaza) in the Chin Na I've encountered, and Judo seems to be more apt in utilizing the jacket for strangulations; however, Judo doesn't have the throat- and muscle-seizing techniques that Chin Na does, and you're more likely to learn leg locking techniques in Chin Na than in Judo.
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