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Why must taking a plane be good safety belt?
From;  Author:Stand originally

Because the plane is commonly in flight process, speed per hour is in 500 kilometers above, boeing plane speed per hour can amount to 900 kilometers, when although be in,landing, speed per hour also is in 200 much kilometers, want to meet emergency at this moment, can cause certain consequence. If the passenger fastens good safety belt, move with plane synchronism, can avoid the force harm to the passenger. Each passenger, to ensure your passenger is safe, when you by air when, asked you not to forget to fasten good safety belt.