When in write-ahead log mode, only the auto_vacuum support property can be changed using VACUUM.
如果SQLite是运行在“写前日志”模式下，则只有（是否支持）auto_vacuum属性可以通过VACUUM命令进行修改。）
Manifolds provide vacuum support for filtration of single, three or six test samples simultaneous. only single vacuum source can help manifolds to finish the whole operation.
多联过滤系统可同时进行多（单、三、六）个样品过滤，只需一个真空气源就可以完成全部操作，节省大量的时间，方便快捷。
The differences in product yields and slates of processing vacuum residue and FCCU slurry in delayed coking are analyzed, which support the conclusion of economic analysis.
还从理论和技术上，分析比较了减压渣油和催化裂化油浆在焦化反应中的产品收率分布的区别，支持了经济效益的分析结论；
The vacuum system process of PET unit, the design of EG steam ejector shape and support, the selection of support spring and the main points in the ejector pipe design are introduced.
介绍聚酯装置的真空系统的流程、乙二醇蒸气喷射泵的外型型式设计、支座设计、支座弹簧选择及乙二醇蒸气喷射泵配管设计中的要点。
The support device is equipped with vacuum chuck. So no manual holding is needed on spreading.
支撑装置中有真空吸盘，涂胶时无需人工扶持。
The support device is equipped with vacuum chuck. So no manual holding is needed on spreading.
支撑装置中有真空吸盘，涂胶时无需人工扶持。
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