噪音等級低 的英文怎麼說

中文拼音 [zàoyīnděng]
噪音等級低 英文
low noise level
  • : 動詞1. (蟲或鳥叫) chirp 2. (大聲叫嚷) make noise; make an uproar; clamour
  • : 名詞1. (聲音) sound 2. (消息) news; tidings 3. [物理學] (音質) tone 4. (姓氏) a surname
  • : Ⅰ量詞1 (等級) class; grade; rank 2 (種; 類) kind; sort; type Ⅱ形容詞(程度或數量上相同) equa...
  • : Ⅰ名詞1 (等級) level; rank; grade 2 (年級) any of the yearly divisions of a school course; gra...
  • 噪音 : noise; undesired sound; strepitus
  • 等級 : 1 (按質量、程度、地位等的差異而作出的區別) grade; rank 2 (在社會地位和法律地位上不平等的社會集...
  1. The lg series pump is single - suction multi - stage segmental vertical centrifugal pump for use in handling water supply and drainage in high rising buildings, industrial, mining and municipal applications, make - up water in chemical plant, water circulation in low - pressure boiler

    本系列泵是立式、單吸、多分段式離心泵,具有結構緊湊、、佔地面積小、重量輕優點,主要用於高層建築的生活供水,工礦企業、市政工程給排水,化工流程補給水,以及壓鍋爐循環用水場合。
  2. This paper gives a brief introduction of the formation mechanism of sma and the handing property of pavement from the aspects of theory and research. at the same time, this paper also studies the effect of aggregate size on road - related performance in some different grads. except, it also having inspected to use the sbs, the pe and the combination material of sbs and pe to analyze the influence to the function of material road

    瀝青瑪蹄脂碎石混合料( sma )以其溫度穩定性好、抗滑性能優良、、使用耐久優點在公路建設中越來越受到重視,本文對sma組成特點,強度形成機理與路面使用性能從理論和試驗研究角度進行論述,並針對不同配的瀝青瑪蹄脂碎石混合料,分析了粗、細集料的粒徑變化對其路用性能的影響,同時也考察了用sbs 、 pe 、 sbs和pe復合改性后的瀝青結合料對混合料的路用性能影響。
  3. We got a new model centrifugal fan by the mathematics optimum design, experiment optimum design, lots of mathematics calculation and regress calculation in the paper. the efficiency of this new fan is increased 6. 44 % and the noise is reduced 4. 78db than that of the original fan

    本文通過數學優化和試驗優化相結合的方法,並對實例經過大量的數學計算、試驗及回歸計算得到了一種新型離心式通風機,該通風機比它的原型機( 4 - 72no . 4a )效率提高了6 . 44 ,比a聲了4 . 78db 。
  4. Larger loading capacity under the same specification ; easily establishing lubricant oil film, smaller friction coefficient, higher transmission efficiency, saving energy ; highest accuracy up to grade 3 of din standard ; smoother functioning, lower noisiness and longer service life

    平麵包絡環面蝸桿與普通圓柱蝸桿傳動相比具有更大的承載能力,易於建立動壓油膜摩擦系數小,傳動效率高節省能源具有可磨削性,能達到din標準三,面粗糙度優于ra0 . 4而且具有運行平穩壽命長優點。
  5. Our company is one of the largest distributors of america marley cooling tower co., ltd. in china district, specially in factories, office buildings, chemical industry and power station

    上海神風製冷設備有限公司廣州辦事處,馬利冷卻塔一經銷商,專業經銷冷卻塔.其換熱效率高,漂水少,,運行穩定卓越性能不僅全面符合國家標準,也得到用戶的一致認可和支持。
  6. It can be operate for the sorting purpose either in single sieve or multi - sieves with a compact structure, seay operating and repairing, smooth running, low noise, large materials - treating, good fineness, and wide applicability etc

    本機可用於單層或多層分使用,具有結構緊湊、操作維修方便、運轉平穩、、處理物料量大、細度小、適用性強優點。
  7. Close to a million people at home suffer road traffic noise higher than 70 db ( a ) l10 ( l hr ), which is the minimum acceptable standard in the hong kong planning standards and guidelines

    香港規劃標準與準則訂明的最可接受道路標準,是每小時有一成時間的效連續聲為70分貝( a ) ,然而,香港有接近100萬人在家裡要忍受超逾這標準的道路
  8. Its test results indicate : voltage mode inverters with high frequency link have the advantages such as high frequency electrical isolation, simple topology, two - stage power conversions, high power density, bidirectional power flow, good line current waveform, low audio noise, high converting efficiency, and high input power factor etc. this kind of converter lay the key technical foundation on new type high power density, high efficiency and low cost asi

    設計的1kva270v 10 % dc / 115v400hzac單極性移相控制雙向電壓源高頻環節逆變器原理試驗表明,這類逆變器具有高頻電氣隔離、電路拓撲簡潔、兩功率變換( lfac / hfac / lfac ) 、功率密度高、雙向功率流、、變換效率高、網側功率因數高優點,為新一代高功率密度、高變換效率、成本航空靜止變流器奠定了關鍵技術基礎。
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