U型多功能方箱用途：用于高(gao)度(du)定(ding)(ding)位(wei)或平臺(tai)拓展(zhan)及其它附件(jian)(jian)的定(ding)(ding)位(wei)或壓(ya)緊，是(shi)為了保證工件(jian)(jian)在加工過程中達到(dao)一定(ding)(ding)高(gao)度(du)要求，而將支撐(cheng)件(jian)(jian)定(ding)(ding)位(wei)在平臺(tai)上的元件(jian)(jian).