In a scenario with multiple persistence units, the selection can be constrained by persistence unit name using an LDAP style filter.
在一个拥有多个持久性单元的场景中，可使用一个ldap样式过滤器根据持久性单元限制选择。
2
The SLT32 offers simple menu selection of measurement units (gallons, liters etc.), calculates volume in horizontal round tanks, or flow rate (and total) through any flume or weir.