What do you mean, stuck?

The crutch is a crutch in Yantai dialect, which is also a crutch used by carpenters. When they measure whether what they do is up to standard (such as whether the angle of the table is 90 degrees), they should use this crutch to stick to it. Anything that can jam (crutches) is qualified, ok. Card is not stuck (not stuck), and it is unqualified. Qualified, regular and reliable