Increased Productivity； Excellent suction performance； Ergonomic operation； Robustness and durability.
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Increased Productivity; Excellent suction performance; Ergonomic operation; Robustness and durability.
提高工作效率；吸水极佳功能；人力工程学设计；经久耐用。
To enhance the structural safety, efforts shall be made in aspects such as structural robustness and durability as well as safety margin for structural members.
增加结构设计的安全性需要从结构构件承载能力的安全度、结构整体牢固性和结构耐久性等多方面努力 ，这三者都应提高 ；
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