เวลาใส่ elevator ควรใส่ใกล้ ๆ Colla

เวลาใส่ elevator ควรใส่ใกล้ ๆ Collar เพราะเวลา Balance ดึงขึ้น จะได้ลดแรงกระแทก ไม่ทำให้ safety pin หลุดออก

Results (English) 1:

Time to put the elevator should be put near the Collar, because time will lessen pull up Balance does not make safety pin dropped out.

Results (English) 2:

Enter the elevator should put near Collar Balance pulled up because it does not cause safety pin cushion out.

Results (English) 3:

Time to put elevator should put near the Collar because time Balance pull up to reduce the impact won't make safety pin off.