A: the lever of the bent head on the wall, and then from the other side to fill sand, DunShi after filling, to open a snappy, the bend or U (V) (stick) with wooden hammer knock gently, not paragraph to tube filling sand, repeat the above steps, until the knock straight, the strength should be light. The wind resistance of the straight rod is reduced. A thicker pipe can be used to increase the strength. If the rubber band is in trouble, remove it and do the above operation.
A tube made of aluminum or iron should be placed under the maximum force of the ledger to increase strength.
If vitreous steel is like, blow with hot hair dryer or go up study outdoor club to change a bar, 5 yuan.
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