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中央空调用的制冷剂有那几种呢_百度知道

活塞式 螺杆式和离心式机组用的制冷剂有那几种制冷剂有:F22 F134A比较老的机型还在用F12(F代表氟利昂) 吸收式机组的制冷剂用的是溴化锂溶液 ... Read more

Sofa Beds :: Single Sofa Beds - Futon Company | Futons

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Taking a Proper Water Sample | www.denelelabs.com

Water quality data is only as good as the water samples from which the measurements are taken. Even the most precise laboratory analysis of a water sample cannot ... ... Read more

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Steel, Commercial Forms : Hot and Cold Roll steel, shapes ...

Commercial Forms of Steel: Hot and Cold Roll steel HR bar: Any steel, alloy, low carbon or high that is rolled at the mill and left with the scaled finish and in the ... ... Read more

Dolce&Gabbana Official Site and Online Store: Summer …

Dolce&Gabbana presents The Summer 2017 Collections: Menswear, Womenswear, Childrenswear, Eyewear, Watches, Jewellery and more. ... Read more

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Wastewater Construction Permitting: Intro, Contacts - SC DHEC

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Wholesale Industrial Rigging Supplies | Elite Sales

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Products - Changning Dekang Biotechnology Co.,Ltd

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