METHODS: The trial design was randomized, double blind, double modeling and multiple center.
方法：采用随机、对照、双盲、双模拟、多中心试验设计方法。
The bearings are classified by elements as single row, double row and multiple row bearings.
根据滚动体排列情况，可以把这类轴承划分为单列、双列和多列。
Whether a single, double, triple or multiple entry visa is required ?
需要一次、两次、三次或多次签证？
If you have multiple test scripts, double-click the test script that you want to open.
如果有多个测试脚本，请双击您希望打开的测试脚本。
Used to produce single, double and multiple corrugated carton.
适应单、双多层瓦楞纸箱生产。
Used to produce single, double and multiple corrugated carton.
适应单、双多层瓦楞纸箱生产。
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