?專家測評:在正(zheng)式進(jin)行道(dao)路劃(hua)(hua)線(xian)(xian)作(zuo)業(ye)前,為(wei)(wei)(wei)保證所施(shi)(shi)劃(hua)(hua)道(dao)路標線(xian)(xian)的(de)順直性,通(tong)常需要預先施(shi)(shi)劃(hua)(hua)一(yi)條參照線(xian)(xian),也稱為(wei)(wei)(wei)預標線(xian)(xian),TT-YBX型預標線(xian)(xian)機專為(wei)(wei)(wei)該種施(shi)(shi)工作(zuo)業(ye)設(she)計(ji),該機可可同時施(shi)(shi)劃(hua)(hua)四條預標線(xian)(xian),有效提(ti)高道(dao)路劃(hua)(hua)線(xian)(xian)的(de)施(shi)(shi)工效率。