The mechanical environment is described in the paper and then the environments in three different orbits are proposed, called leo ( low earth orbits ), meo ( medium earth orbit ) and geo ( geosynchronous earth orbits ). the influence produced by the atomic oxygen, micrometeorites and debris, ionizing radiation and cold welding under vacuum is presented in the paper. some principles are proposed, which can be as the method to choose materials of the mechanism in space environment
空間環境中力學環境對可動結構的影響直接關繫到機構的設計問題,所以本文第四章中嶽建如:中文摘要浙江大學博士學位論文20024首先詳細論述了空間環境中的力學環境,然後給出了空間環境的三種軌道環境劃分,及每
一種環境影響因素對空間可動結構設計的影響,包括原子氧、離子射線、溫度、微隕石和碎片以及真空冷
焊現象等環境因素,提出了材料選擇的原則,為可動結構材料選擇提供了
一定的依據。
Phenolic foam is a new generation heat preservation prevent fire soundproof material and polystyrene together ammonia ester foaming rubber etc, material to compare, and it is good that its biggest characteristics is a heat - proofound the low temperature contractility is smatt, and have te special prevent burning wit the size stability under 2000 heat, not burning, not melt not contract constant form not poisonous spirit hove no thick smoke, just surface formation layer
信息內容:酚醛泡沫為新
一代保溫防火隔音材料與聚苯乙烯聚氨脂發泡橡膠比,其最大特點是耐熱性好,低溫收縮性小,具有獨特的阻燃和尺寸穩定性,在
焊槍火焰下,不燃燒不收縮不變形,無毒氣無濃煙,只是表面炭化,性質穩定,耐化學腐蝕抗老化。
Most scholars believe that the arms of brass and copper alloy european metalwork were cast whole from a single mold in van eyck ' s time ; crockets were not soldered or riveted onto the main arms
多數學者相信,在范艾克的時代,歐洲的黃銅或其他銅合金的金屬工藝中,整隻吊燈臂是從
一個模子里鑄出來的;而且上面的雕飾並不是
焊接或鉚接到燈臂主體上。
A kind of stainless steel flux - cored wire has been successfully developed, based on acid slag type system, by adding a bit of oxides and trace of deoxidizer, adjusting the fluidity of melting slag to increase shielding of the back weld
在酸性渣系的基礎上,通過添加少量氧化物,調整熔渣的流動性,並加入微量的強脫氧劑,以增強背面
焊縫的保護,研製成功
一種背面不充氬的不銹鋼打底單面
焊雙面成形專用藥芯
焊絲。
It consists of two thin strips of dissimilar metals fused together.
它是由兩條薄薄的不同金屬片
焊接在
一起而構成。
The enterprise of sieg blitz ek offers you cutting systems, welding systems and other as well as the further oxyacetylene process and dismantling machine tools
Sieg blitz ek是
一家現代化的、可靠的產品供應商,這家供應商從事切割系統,
焊接系統,氣
焊,其它,拆除的機床的製造、銷售。請您訪問我們的主頁,垂詢當前的產品系列和服務。
Energizing the machine "start" switch places the machine in an automatic single cycle operation that completes the element assembly.
開動機器,進行
一次自動循環運轉就完成極群組的鑄
焊。
The 11th beijing essen welding & cutting fair is open today. on behalf of china welding association, i warmly congratulate its opening
第十
一屆北京?埃森
焊接與切割展覽會勝利開幕了,我謹代表中國
焊接協會表示熱烈祝賀!
To further reduce equivalent series resistance and improve long term reliability, the leads are then soldered with lead free silver solder
為了進
一步的減少等效串聯阻抗和改善,長期的信賴度,引線是以無鉛銀
焊錫來接
焊
There are 500 ton and 315 ton oil pressure, and 176 sets of kinds of machine process and checking equipments in the factory. the mould we designed are economical applied and low making charge short period. we produce back - door level air - spring, jack, brake oil pipe, accelerator pedal for micro car and engine mid - parts, gemel, tri - way air pipe, adiabatic board and other welding parts
工廠主要生產微型汽車系列背門撐桿制動油管千斤頂等總成,以及發動機倉中置構件側圍頂上內蒙皮等沖
焊件,已形成年產30萬車付的能力,其中背門支撐桿制動油管供應量佔了長安公司
一半以上。
The system is composed with concrete filled cold - formed square steel tube column, the beam with two cold formed c type steel welded together back to back, the slab with profiled - steel and concrete, the beam and the slab joined into composite steel - concrete beam. they all together make up of the bearing members. and the house also includes the light economical - energy sources heatproof walls
該體系是以冷彎薄壁方鋼管混凝土為柱、冷彎薄壁c型鋼背靠背高頻
焊接組成工字型梁、壓型鋼板上現澆築混凝土組成組合樓板並與梁
一起構成組合梁作為承重構件,以輕質節能保溫型墻體作為圍護結構組成。
The ningbo bor ultrasonic limited company is chinese and foreign cooperations is engaged in the ultrasonic wave clearer, the ultrasonic wave plastic welding apparatus, industry cold water machine, the commercially pure hydraulic engine collection development, the design, the manufacture, the sale in a body enterprise, has more than one batch of years to be engaged in the ultrasonic cleaning profession the project specialized technical team, the technical force is abundant
寧波博爾超聲波設備有限公司是
一家中外合作從事超聲波清洗機超聲波塑料
焊接機工業冷水機工業純水機集開發設計製造銷售於
一體的企業,擁有
一批多年從事超聲波清洗行業的工程專業技術隊伍,技術力量雄厚。
" bor " the series product, uses now the international leading technology, american, german, the japanese import name brand electron primary device, the raw material production manufacture, at present has several series, 100 many kinds of specifications, the variety complete standardization series product, as well as the large - scale non - sign using plc, touches the screen and the labor controls the completely automatic ultrasonic wave clearer, the ultrasonic wave plastic welding apparatus which the computer control screen demonstrated, industry cold water machine, the commercially pure hydraulic engine and so on the non - sign equipment
「博爾」系列產品,採用當今國際領先技術,美國德國日本進口名牌電子元器件原材料生產製造,目前有十幾個系列
一百多種規格品種全的標準化系列產品,以及大型非標運用plc觸摸屏及工控電腦控制屏幕顯示的全自動超聲波清洗機超聲波塑料
焊接機工業冷水機工業純水機等非標設備。
The orientation between the upper and lower orifices shall be inosculated while the equipment welding
設備安裝
焊接時,上下孔板應注意保持方位
一致。
11 i am a mechanician. ( electrician, pipelayer, welder, carpenter, turner, blacksmith, builder, erector, riveter, rigger, concrete worker, engine - driver, repair worker )
我是
一個機械工。 (電工、管工、
焊工、木工、車工、鐵工、建築工人、安裝工人、鉚工、起重工、混凝土工、司機、維修工) 。
Hello ? memo to bigweld : we ' re not a charity
哈? . . .提醒大焊一下:我們不是慈善機構