loom back rest的用法和样例：
- Praxis Tests of the Freely Programmable Active Loom Back Rest Systems
- You came back restfully, we are at ease.
- There are flat beds, but you can’t just slide down into them - you have to get up, put the back rest of the seat down like a commode, make your bed, then sleep.
- He sat on the grass, his back resting against the tree.
- The yarn from the weaver's beam passes round the back rest and comes forward through the drop wires of the warp stop motion to the heald, which are responsible for separating the warp sheet for the purpose of shed formation.