Dictionaries establish a mapping between commonly appearing text strings, and integers, and provide an effective mechanism for compressing and decompressing XML.
字典在常见文本字符串和整数之间建立映射，并为压缩和解压缩xml提供一种有效的机制。
2
Air spring is a elastic mechanism that using the reactive force of compressing air, reactive force of raising effective area for the deformation and the resultant of above two forces.