adjustment to each other
attract each other with the same nature
Connection with different radius pipes each other
cross jointing sections with each other
displacement reciprocal each other
Energy complement each other in air
five elements hide with each other
grain group with easy axes parallel to each other
harmony and echo-ing each other
positions are conformed to each other
re build of resources complement each other
repulse each other with the different nature
Teachers and students acting each other
achieving output and quality