模式和机制；
Note:Cover for cable tray Modle T1-02 is available. In making an order , just indicate the tape of cover whose weight is exclusive.
注：T1-02弯通桥架备有护罩，需订护罩请在订货时按型号注明，重量另计。
Note:Cover for cable tray Modle T1-03 is available. In making an order , just indicate the tape of cover whose weight is exclusive.
注：T1 -03弯通桥架备有护罩，需订护罩请在订货时按型号注明，重量另计。
The fourth part is about the modle of database gateway based on XML and the fifth part introduces the test to the modle of database gateway;
第四章介绍了基于XML数据库网关模型；第五章测试数据库网关模型；
The fourth part is about the modle of database gateway based on XML and the fifth part introduces the test to the modle of database gateway;
第四章介绍了基于XML数据库网关模型；第五章测试数据库网关模型；
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