注意：在泵排泄口，首选的止回阀是管内弹簧负载，带杠杆和压铁或杠杆和弹簧的旋启式止回阀。
Note: On pump discharge, the preferred check valves are an in-line spring loaded, swing design with lever and weight or lever and spring.
尼伯科旋启式止回阀可配置外部操纵杆和压铁。操纵杆和压铁用于对阀瓣进行外部控制。
NIBCO swing check valves are available with an outside lever and weight. The lever and weight arrangement is used to maintain exterior control over disc movement.
根据笔者所提出的螺旋理论，对1,2 -二取代二茂铁及其衍生物的结构与旋光方向间的关系进行了分析。
The relationship between structure and rotatory direction of 1, 2-disubstituted ferrocene and its derivatives is analyzed based on the helix theory proposed by the authors.
阐述了在松散渣铁层及河岸漂卵石层中快速成孔，形成较大直径的旋喷注浆桩的过程。
The paper describes the building-up process of a large size rotary jet slip-casting pile by quick pore-forming in bulky iron slag layer and in river banks floated pebble bed.
广东省台山市百诺特瓶盖有限公司是一家主要经营玻璃容器铁瓶盖子三旋盖和四旋盖的包装公司。
Taishan City, Guangdong Province, Bainuote caps co., LTD. Is a company mainly engaged in glass bottles of iron cover, 3-groove cap and 4-groove cap packaging company.
广东省台山市百诺特瓶盖有限公司是一家主要经营玻璃容器铁瓶盖子三旋盖和四旋盖的包装公司。
Taishan City, Guangdong Province, Bainuote caps co., LTD. Is a company mainly engaged in glass bottles of iron cover, 3-groove cap and 4-groove cap packaging company.
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