Our company mainly produces series of accessory products as rivets, bolts, nuts, flat washers, spring hooks, stoppers and axis pin & flat keys etc. all the products strictly follow national standards.

Properties files are flat - they don't offer any sort of nesting or grouping of keys - but you can pseudo-nest your keys by creating dotted names with identical prefixes.

The paper discusses the goals, demands, functions of regional logistics information flat and analyzes the keys and frames of planning.