Do not use twisted pair, is extremely wrong. 485 bus must be hand in hand type bus structure, resolutely eradicate star connection and branchconnection.
不选用双绞线，是极端过错的。485总线一定要是手牵手式的总线结构，坚决根绝星型连接和分叉连接。
2
Typically, a branch refers to a database connection.
一般，分支指的是一个数据库连接。
3
Use this branch of a flow to define logic that should be executed when a connection has been opened but no data has been processed on it yet.