《周礼·冬官考工记·磬氏&车人》
凡检验庐人所制作的长兵器的柄，树立在地上摇动它，以观察它是否弯折；撑在两墙之间，以观察它弯曲是否均匀；横过来摇动它，以观察它是否强劲有力。
凡试庐事，置而摇之，以眡其蜎也；炙诸墙，以眡其桡之均也；横而摇之以眡其劲也。
When testing the handles of long weapons made by the Lu people, stand them on the ground and shake them to see if they bend; prop them between two walls to see if they bend evenly; shake them horizontally to see if they are strong and powerful.