"section by section." The author uses this graphic description of how the Levite cut up her body into specific pieces to emphasize what he did. "Limbs" refers to a person's arms and legs. If there is not a similar phrase in your language, this description may be left out of the translation. (See: [[rc://en/ta/man/translate/figs-idiom]])
This means that he sent sent the different pieces to twelve different areas of Israel. AT: "sent each piece to a different place throughout Israel" (See: [[rc://en/ta/man/translate/figs-explicit]])