2.Operation Mode1Expansion and closure of folding arm：①Expand the folding arm and tighten the two fixed pulleys at the interface；②Loosen the two fixed pulleys at the interface and close the folding arm.2Installation and disassembly of a series gimbal：①Install the a series gimbal, tighten the retaining ring；②Loosen the retaining ring and remove the a series gimbal gently.After installation, please tighten the retaining ring.①①②②2
