图示为纺织机中的差动轮系，设[tex=41.286x1.286]p8DDnFDwr8Q+L9zQ90/fso2zYzpMVJm7zwNk6iG7VkRNBtNMKhPF+/lMTCsOYXzL+ExZstE7LuQngKVLw2pwbo1XuF/Z8EQK60HBhKrRpVdWoKsTD4PLfxEtUQYl9oZ7/w+/TgLSY4i/iUn/B6NZZQ==[/tex]，求 n6等于多少 ?[p=align:center][img=196x229]17b3051ebe149fb.png[/img]