(Mishnah - R. Yehudah): We may make Pasim (planks) around Bira'os (wells, to permit carrying inside), i.e. four Deyumadim (L-shaped posts in the four corners of a square) that look like eight;

R. Meir says, we make eight Pasim that look like 12, i.e. four Deyumadim and four Peshutim (straight planks, one in the middle of each side).

The Pasim must be [at least] 10 Tefachim tall and six Tefachim wide. They can be any thickness;

R. Meir says, the distance between them is [at most] the width of two teams of three cattle [each];

R. Yehudah says, it is the width of two teams of four.

[The bulls in each team are] tied together, and not loose. [We consider the width necessary to allow] one [team] to enter and one leaves [at the same time. I.e. there is some room in between. Therefore, we allow for each bull one and two thirds Amos Sochekos, i.e. composed of Tefachim in which there are small spaces between the fingers.]

(Gemara): Because Parutz Merubah Al ha'Omed, he makes Deyumdin, but not simple planks. It (the well) proves about itself that [the Heter was given for the sake of] going to the well.

(R. Ze'ira citing R. Elazar): [From here] you understand how much [one must be meticulous about] the laws of Techumim of Shabbos [and Mechitzos]! If he did so (made Pasei Bira'os) elsewhere (not around a well) and went and through four Amos in Reshus ha'Rabim [within the Pasim], he is liable. (Only when they surround a well, they make Reshus ha'Yachid.)

(R. Yosah): Everywhere, [a Mechitzah must be] Omed Merubah Al ha'Parutz, and here you were lenient for him [to permit] Parutz Merubah Al ha'Omed, so you were stringent on him in another way;

Everywhere, one may make a plank of four Tefachim, and here he must make a plank of six Tefachim.

(R. Yirmeyah citing Rav): They permitted Pasei Bira'os only for Olei Regalim.

(R. Avin): [He means that they permitted them only] at the time [while the Mikdash stands, and there are] Olei Regalim.

(R. Yirmeyah citing R. Shmuel bar Rav Yitzchak): [They permitted them] due to Olei Regalim [but they are permitted even nowadays].

Support #1 (R. Ezra, to R. Mana - Beraisa): We may make Pasei Bira'os nowadays.

Support #2 (Mishnah): We may use a Galgal (wheel) on Shabbos to draw water from Bor ha'Golah and from the great pit [in the Azarah, and outside the Mikdash, from Bor ha'Kar on Yom Tov];

Why may we draw from Be'er ha'Kar on Yom Tov using a wheel on Yom Tov? When the exiles returned [from Bavel at the start of Bayis Sheni], they camped by that well [and needed water], and prophets among them permitted it to them stipulated that they may draw from Be'er ha'Kar on Yom Tov using a wheel on Yom Tov.

They did not permit all Be'eros ha'Kar (wells), only the well at which they camped.

Just like you say there, that what was permitted, was permitted [permanently, even when the reason for the initial Heter does not apply], also here [Pasei Bira'os], what was permitted, was permitted [permanently].

R. Avdimi of Chaifa ruled in Chaifa, and R. Yirmeyah ruled in Chalaf [to permit] Pasei Bira'os nowadays.

Assertion: They wanted to say that R. Meir agrees to R. Yehudah, but R. Yehudah does not agree to R. Meir (this will be explained);

Question: [How can you say that] R. Meir agrees to R. Yehudah? R. Meir requires Diyumdin and Peshutim, and you say so?!

Answer: (R. Meir agrees that mid'Oraisa, Diyumdin alone permit.) If you would [say to] make Diyumdin and not Peshutim, one will think that they are proper Mechitzos of Shabbos [everywhere], and he will do so elsewhere and be liable [for elsewhere, inside the Pasim is Reshus ha'Rabim].

(R. Acha citing R. Chinena): He (R. Meir) does not agree to him (R. Yehudah), and he (R. Yehudah) does not agree to him (R. Meir).