[Question translated from Hebrew:] At the end of the Daf it says, "Shema Yemasech Achar Cheftzo" -- "perhaps he will be drawn after his object [beyond his Techum]." What about the object itself? Doesn't his object acquire the same Makom Shevisah as he does? Why shouldn't it also be forbidden for the object itself to go beyond 2000 Amos?
You question applies to both Rav Nachman and Rav Huna. Rav Nachman says that even though the person's Techum ends at 2000 Amos, he may carry (by way of throwing) an object beyond that point, within the enclosed area. If his object also has his 2000-Amah Techum, why is it permitted for him to throw the object beyond 2000 Amos? Rav Huna says that one may not carry within 2000 Amos, lest one be drawn after his object beyond his Techum. But the object itself may not go out of his 2000 Amos!
The answer is that the Gemara is discussing objects that belong to other people, and not to the person who is limited to these 2000 Amos. Alternatively, the Gemara is discussing objects of Hefker that are not Koneh Shevisah (Mishnah Berurah OC 403:7).
The fact that the Gemara says the word "... Achar Cheftzo ," implying his object, is not problematic, because it does not mean that he owns the object, but rather that it is the object which he wants to carry.
Best wishes,
-Mordecai