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BDJ form 2

This is form 2 of the 8 forms of ba duan jin, 八段锦, qi gong exercise

From  T_Lei on September 23rd, 2020 0 likes 0 plays

Clip of M7.1 Torque and equilibrium

Explanation of torque and methods to calculate torque

From  Berg-stress-er on August 26th, 2020 0 likes 19 plays