and you are to make forty silver bases to go under the twenty frames – two bases under the first frame for its two projections, and likewise ¹  two bases under the next frame for its two projections;

He made forty silver bases under the twenty frames – two bases under the first frame for its two projections, and likewise ¹  two bases under the next frame for its two projections,

with ¹  two projections per frame parallel one to another. ²  He made all the frames of the tabernacle in this way.

with two projections ¹  per frame parallel one to another. ²  You are to make all the frames of the tabernacle in this way.