heat retaining 中文意思是什麼
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The raw materials, the composition, the time of milling, the calcining temperature, the different additives, the sintering temperature and the sintering parameters were investigated. the result showed : it was advantaged to obtain high initial permeability mnzn ferrite with stable frequency characteristic using high - purity raw materials ; in order to obtain mnzn ferrite with high properties, we must control strictly the composition ; it could improve the properties of mnzn ferrite by optimizing calcining temperature. the lower calcining temperature made the permeability higher, and the higher calcining temperature could promote the frequency characteristic of permeability ; we chosen the right time of milling according to the requirement of power diameter ; in order to improve the properties of mnzn ferrite, it is necessary to add effective additives. in this dissertation, the influence of bi2o3 、 moo3 、 k2co3 、 co2o3 were investigated ; the sintering temperature, the time of heat - retaining and sintering parameters were the key factors of preparing high permeability mnzn ferrites
研究結果表明:採用高純度的fe2o3有利於獲得高起始磁導率且頻率特性優良的鐵氧體;為了制備所需性能的鐵氧體，需要嚴格控制配方中各種原材料的含量，優化配方;由於粉體活性受預燒條件的影響，所以對不同要求的鐵氧體選擇的預燒條件就不一樣，適當降低預燒溫度有利於獲得較高的起始磁導率，而為了獲得良好的頻率特性可以適當地提高預燒溫度;根據對粉體顆粒粒徑的不同需求，可以選擇不同的球磨時間;而有效的添加劑是改善材料性能的必要條件，本文在添加劑的研究中主要對bi2o3 、 moo3 、 k2co3 、 co2o3的影響分別作了詳細地討論;燒結溫度、保溫時間和燒結氣氛是高磁導率mnzn鐵氧體制備最關鍵的工藝，適宜的燒結工藝可以獲得理想微結構和組成，從而得到高性能的鐵氧體材料;而從材料的微結構上來看，要提高材料的截止頻率，就要適當地細化晶粒、增加晶粒內部的氣孔。 -
The application is not pressure retaining welds for pressure vessels or heat exchangers, unless such welds are fully radiographed or ultrasonically tested
此方法不能用於壓力容器或換熱器受壓部件的焊接，除非焊縫進行100 %射線透照或超聲檢測。 -
Specialized in producing various connection posts of petrol machines and aluminum alloy castings and so on, our company has more than 40 sets of nonferrous metal casting machines and 100 sets of mechanical processing machines, including many advanced machines such as lijing frozing casting machines and japan ( zhengying ) successive smelting and retaining stoves and burning heat treatment stoves
公司專業生產各種通用汽油機連桿、輪轂及汽車鋁合金鑄件等產品，擁有有色金屬重力鑄造設備40餘臺（套）和機械加工設備100餘臺（套） ，包括力勁冷寶壓鑄機、日本（正英）連續熔解保持爐和燃氣熱處理爐等先進設備。 -
Zhejiang hongqiang metal products co., ltd. is a giant professional export enterprise, producing a series of heat - retaining cntainers, including stainiess steel vacuum coffee - pots, high - pressure thermoses, vacuum flasks and auto mugs etc
浙江宏強金屬製品有限公司是一家專業和產不銹鋼真空咖啡壺、高壓熱水瓶、保溫杯、汽車杯等系列保溫容器的大型出口企業。 -
To overcome the restriction of water and heat on agricultural production in northwestern arid and semiarid region, the farming practice of clear plastic film mulch was spread due to its capacity of retaining water and temperature in the winter wheat field in many areas, howeve r soil properties had also were affected significantly in the meantime
在西北乾旱半乾旱地區，為了克服水熱資源對農業生產的限制，地膜覆蓋的農作措施以其顯著的增溫保墑作用在冬小麥農田得到了大面積的推廣和應用；與此同時，該農作措施下的土壤性質也發生了深刻的變化。 -
Multiple layers of light clothing will trap air better than a single layer of heavy clothing, hence retaining body heat and providing more comfort
多層的輕便衣物可以堵住空氣，比起一件厚衣物更能保存身體熱能及更舒適 -
The soundproof and heat retaining material of high efficiency can be installed at inner side of the aluminum plate in case of acoustic insulation and heat preservation needed
如果需要隔音保溫，可在鋁板內側安裝高效的隔音保溫材料。 -
According to the different regions particularly, many problems have been paid broad attention to, such as energy saving, heat retaining and the using of nature resources
特別是針對不同地區，建築的節能、保溫以及對自然資源的利用等問題已經得到了廣泛的關注。
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