长寿命

As for the air percussive rotary drilling, because of its advantages of high ROP, long bit life, light WOB, reduced wear of drill collar, large cuttings, low drilling cost, low formation damage and no lost circulation, it has gained acceptance.

空气冲击回转钻井在一些特定的地层和井眼条件下具有高机械钻速、长钻头寿命、小钻压、较轻钻具磨损、大岩屑、低钻井成本、较轻油层污染和避免井漏等优点，因此很早就被钻井界接受。

The area is small to the highest ( conversion efficiency 13 - 15%, some have achieved more than 20%) of monocrystalline silicon solar energy cell conversion efficiency, and output power is big, and stability is good, grows ( generally can reach more than 20 years ) service life, but the raw and processed material cost height, the weak light specific property is wronger, and production technology is complicated, hence the selling price is also higher; The polycrystalline silicon solar energy cell is basic identical with the function characteristic of monocrystalline silicon solar energy cell; The conversion efficiency of non- brilliant silicon solar cell than hangs down ( simples about 6 - 8%), the area is than greatly, but because of his raw and processed material cost than hanging down, can be easy to big area industrialize production, what will have hope to be used the generally big area to generate electricity from now on most will be this kind of application that battery is along with manufacture technique and new material, in a single day the practical package photoelectricity conversion efficiency of its big area achieves more than the 10-15%, and the price of every tile electric power-generating equipment is fallen 1 - 2 U.S.dollar of time, and just is enough to that the solar energy cell efficiency that big area the getting extensive use will constantly replace in now convention certainly special use and the laboratory of sources of energy s will high get many.

单晶硅太阳能电池转换效率最高（转换效率13～15%，有的已达到20%以上），面积小，输出功率大，稳定性好，使用寿命长(一般可达20年以上)，但原材料成本较高，弱光特性较差，生产工艺复杂，故售价也较高；多晶硅太阳能电池与单晶硅太阳能电池的性能特点基本相同；非晶硅太阳能电池的转换效率较低（约6～8%左右），面积较大，但因其原材料成本较低，可便于大面积工业化生产，今后最有希望用于一般大面积发电的将是这种电池。随着制造技术和新材料的应用，一旦它的大面积实用组件光电转换效率达到10-15%以上，每瓦发电设备的价格降到1～2美元时，便足以大面积得到广泛应用并将不断取代现在常规能源。当然特殊用途和实验室中的太阳能电池效率要高得多。

By the XPS and UPS studies, iodine was found to be present as AgI on the surface of the catalyst.

说明该修饰剂处理后的电解银可能具有较长的寿命。

Bimetal not currents through, avoid the impact from the effects of heat, temperature changes

双金属片无电流通过，避免了自热效应的影响，因此温度变化小，寿命长。

Sulphur and alkalis, are features of the RHI Refractories grades and in combina

用性要求的窑口理念，达到了一个最长的耐火砖使用寿命。

PLUS SERIES metallic colors have greater brilliance, can be easily coated without any loss in luster and have a longer life after printing without fear of tarnishing or blemishing.

PLUS系列金属色更闪亮耀眼，可轻鬆涂层而丝毫无损光泽度。其印后寿命更长，无需担心脱色或产生斑点。

Insert a metal cutting blade of Diamond caking material, long life.

切割刀片采用金属镶焊金刚石结块材料制成，使用寿命长。

All of the parts made from high quality alloyed steel, and processed through carbonizing and quenching or improving quality.

另部件全部采用优质合金钢制造，并经渗碳淬火或调质处理具有承载能力强及使用寿命长等特点。

Maybe it's because palm cockatoos live so long that they have time to learn so much.

或许棕榈凤头鹦鹉寿命如此长，使得它们有时间学习很多。

Heat transfer oil enters into the boiler from the topdrains out from the bottom, which cannot easily be coked, with long service life of boiler.

导热油下进上出，有利于排气，导热油不易结焦，锅炉使用寿命长。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。