10. Through the centroid $G$ of the base of the triangular pyramid $P-ABC$, draw 3 parallel sections to each of the three faces. These sections divide the pyramid into several parts. The ratio of the volumes of these parts, arranged from smallest to largest, is $\qquad$
10. $1: 1: 1: 6: 6: 6: 6$

As shown in the figure, tetrahedrons NDJG, OGLE, and QKGH are similar to the original triangular pyramid, with a similarity ratio of 1:3. Let their volumes be 1. It is easy to see that the volumes of the other 4 parts are equal, each being 6.