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为了保证轧制过程的稳定性，必须使用乳液清洗，因为它不仅可以降低轧制力，还可以提高热鍍鋅帶鋼的表面质量。带钢表面残留物与乳化液特性密切相关。为了保证乳液的使用，需要加入添加剂来提高性能，使润滑剂分子在金属表面形成一层或几层由*性分子形成的网络结构的吸附膜，而基础油分子则溶解在这种网络结构中。吸附膜具有

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为了保证轧制过程的稳定性，必须使用乳液清洗，因为它不仅可以降低轧制力，还可以提高热鍍鋅帶鋼的表面质量。带钢表面残留物与乳化液特性密切相关。

爲了保證乳液的使用，需要加入添加劑來提高性能，使潤滑劑分子在金屬表面形成一層或幾層由*性分子形成的網絡結構的吸附膜，而基礎油分子則溶解在這種網絡結構中。吸附膜具有一定的韌性和抗壓強度，能有效防止金屬表面微凸起的直接接觸，防止粘連，減少摩擦。

热鍍鋅帶鋼

由于乳化液中*性分子和金屬表面的吸附力較大，所以添加劑一方面提高了乳化液的軋制性能，保證了軋制的穩定性，另一方面，添加劑中的*性分子與乳化液中的油性成分、細微的鐵粉、軋機液壓系統的泄漏雜油等雜質，通過*性分子的較強*性(吸附)作用，穩定地存在于鋼板的表面凹凸區域。

根據清洗原理，汙物要經過清洗劑的潤濕、浸透、包裹、剝離的過程才能從鋼板表面去除。而*性分子的強烈作用正好影響到上述清洗過程的進行，導致清洗效率下降。

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To regain the highroad we had turned into a northerly fork, and were in as lovely a spot as we had seen all day. Before us and close on our right were the dense woods of magnolia, water-oak, tupelo and a hundred other affluent things that towered and spread or clambered and hung. On the left lay the old field, tawny with bending sedge and teeming with the yellow rays of the sun's last hour. This field we overlooked through a fence-row of persimmon and wild plum. Among these bushes, half fallen into a rain-gully, a catalpa, of belated bloom, was loaded with blossoms and bees, and I was directing Camille's glance to it when the shots came. Another outcry or two followed, and then a weird silence. At the tavern, where we went to smarten up and to eat, we chanced upon Gregory. He was very shy of Ferry, because Ferry was a captain, but told me the latest news from the Wall place, where he had spent the previous evening. Harry and the surgeon were gone to camp, the Harpers were well, Charlotte was--better, after a bad turn of several days. We felt in duty bound to stay within hail of the telegraph office until it should close for the night; and when the operator was detained in it much beyond the usual time, Ferry, as we hovered near, said at length, "Well, I'm sorry for you, Dick; 'tis now too late for you to go yonder--this evening." "Surely, a curious coincidence!" Lawrence cried. Balmayne hastened to the door. He might want some ready lie; on the other hand, his diplomacy might be needed. But he set his teeth a trifle closer as he saw Dr. Bruce standing there. "I have been called," he said. "I'm so sorry for the poor child," she said. Considering material progress as consisting primarily in the demonstration of scientific truths, and secondly, in their application to useful purposes, we can see the position of the engineer as an agent in this great work of reconstruction now going on around us. The position is a proud one, but not to be attained except at the expense of great effort, and a denial of everything that may interfere with the acquirement of knowledge during apprenticeship and the study which must follow. Near Louvain the train had to stop for another two hours, before it was allowed to enter the station, which was quite close by. I thanked my stars that at last I got rid of my companion, who travelled on to Brussels, whereas I got out at Louvain. It was too late to be allowed to walk in the streets,199 but the commander gave me an escort of two soldiers, who were to take me to the mission house of the Fathers of the Sacred Heart. The reformed system of education was to be not only moral and religious but also severely scientific. The place given to mathematics as the foundation of a right intellectual training is most remarkable, and shows how truly Plato apprehended the conditions under which knowledge is acquired and enlarged. 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Sometimes cottonwoods and sycamore trees rose in the bottom, and there was a patch of green around some irrigated land. But, for the most part, the basin was a waste of glittering sand and white dust, and beyond, the low hills, bare of every plant save a few stunted wild flowers, cacti and sage, greasewood and mesquite, rolled for miles and miles of barrenness. The chicken hawk and crow sailed through the fiercely blue sky, the air waved and quivered with incredible heat. At night malaria rose from the ground, the coyote barked and whined at the light of the brilliant stars, and the polecat prowled deliberately. "And do you care for him, too?" he asked, looking her straight in the eyes. It was a very calm question, put—he realized it with exasperation—as a father might have put it. "Hello, boys," said a weak voice, which was unmistakably Alf Russell's. The sleeping room for the Small Ones was, by comparison with the great Commons Room only the masters inhabited, a tiny place. 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