sidepiece
1. (4) The pressure acted on the plank can be delivered to the two sidepieces and then to the bottom by reinforcing the sidepiece;
(4)注浆后使作用在顶板上的压力能有效地传递到两帮,通过对帮的加固,又能把荷载传递到底板;
2. sidepiece bobbing
侧部振打