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Nail / nail

Nail

When we twist screws, often because of the An
gle of the insert Vertical cause can't not turn, even
turn wrest after damaged threadsThe phenomen
on of, the screws can't use.
"Nail" design from this problem, the ordinary sc
rew Make it smooth, "guide" at the bottom of scre
w in even if you don't Vertically inserted into the ca
se also can easily with the screw hole threads Mat
ching.

University

南京艺术学院

南京艺术学院
南京, China

寅瑄 周,
南京艺术学院