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关键词:挡风墙标题:怎么样才能让挡风墙效果好点？来源:知乎文章内容: 企业在实施擋風抑塵牆时，应把好以下关口： 1、擋風抑塵牆的高度设置：擋風抑塵牆的高度直接关系到其下游的庇护范围。如果高度设置不够，其庇护范围远远小于煤场的范围，其抑尘效果肯定难以保证。一般煤場抑塵網價格擋風抑塵牆的高度要高于料堆高度3-5米，同时其庇护范围也和墙高成正比。 2、擋風抑塵牆的设置方式：要想取得好的抑尘效果，必须根据煤场所在地的主导风向、非主导风向设置擋風抑塵牆。主导风向设置抑风墙，消除来流风的风速，非主导风向设置挡尘墙，阻挡扬尘，抑挡结合，才能取得好的抑尘效果。煤場抑塵網價格 3、擋風抑塵牆不同高度区域，应设置不同板型的抑尘板。由于风是层流状的，不同高度区域的风况不同，因此擋風抑塵牆不同的高度区域应设置不同板型的擋風抑塵板，才能做到精确控制风速，取得理想的抑尘效果。煤場抑塵網價格

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Hundreds of pigeons were circling around the temple, or walking among the people that thronged the street. Nobody showed the slightest intention of harming them, and the consequence was they were very tame. Several stands were devoted to the sale of grain for the birds; and the sharp-eyed pigeons knew, when they saw the three strangers halt in front of one of the stands, that there was good prospect of a free breakfast. The Doctor bought a quart or more of the grain and threw it out upon the ground. Instantly there was a whirring of wings in the air, and in less time than it takes to say so the grain was devoured. The birds were rather shy of the visitors, and possibly it had been whispered to them that the foreigner likes his pigeons broiled or served up in pies. But they did not display any such timidity when the natives approached them. Some of the Japanese temples are the homes of a great number of pigeons, and in this respect they resemble the mosques at Constantinople and other Moslem cities. "Don't swallow him," said Ferry, smilingly, "this isn't your private war." "Ah, yes, yes!" she said, "they know all we can tell them and all we can't!" LIX UNDER CHARLOTTE'S WINDOW Hetty caught her breath eagerly. That dark and evil place seemed to have suddenly become part and parcel of her life. Instinctively she half hid herself behind a great dragon vase full of palms. The auxiliary departments, if disposed about an erecting shop in the centre, should be so arranged that material which has to pass through two or more departments can do so in the order of the processes, and without having to cross the erecting shop. Casting, boring, planing, drilling, and fitting, for example, should follow each other, and the different departments be arranged accordingly; whenever a casting is moved twice over the same course, it shows fault of arrangement and useless expense. The same rule applies to all kinds of material. To sum up, it is supposed to have been determined by inductive reasoning, coupled with some knowledge of mechanics, that a steam hammer, to give a dead blow, requires the following conditions in the valve gearing: CHAPTER V. PLATO AS A REFORMER. A station on the road—the delightful days at Bunnoo left far behind. The liaisons of Mme. Tallien had nothing doubtful about them. The taste of the day was expressed in the pictures of the favourite artists, Watteau and Greuze, who painted the graceful groups and landscapes every one admired: charming women sitting in beautiful gardens dressed in costumes suitable for a ball or court festivity, or anything on earth but being out of doors in the country. For the answer they had to wait till dark. CHAPTER XXXIV THE EMERALDS ARE FOUND On the next day they were in the flat, nearing the post. There was a dust storm. Earlier in the morning the air had grown suddenly more dry, more close and lifeless than ever, suffocating, and a yellow cloud had come in the western sky. Then a hot wind began to blow the horses' manes and tails, to snarl through the greasewood bushes, and to snap the loose ends of the men's handkerchiefs sharply. The cloud had thinned and spread, high up in the sky, and the light had become almost that of a sullen evening. Black bits floated and whirled high overhead, and birds beat about in the gale. Gradually the gale and the dust had dropped nearer to the earth, a sand mist had gone into every pore and choked and parched. And now the tepid, thick wind was moaning across the plain, meeting no point of resistance anywhere. Ellton answered "Very good," and they went out, locking the door. "The masters are good," Cadnan said stolidly into the silence. "They let me work." "He's a nice lad, ain't he?" "I—I—the hay seemed right enough." HoME 日韩欧美一级免费一级欧美大黄ENTER NUMBET 003srls.com.cn
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