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Shock! Super L arge, A   P ropeller C osts 1.5 M illion E uros, the F an is S mooth and C omparable to G lass! Large propellers generally include hubs, blades, blade roots, edging, blade and leading edges. The manufacture of super-large propellers involves many difficulties such as casting technology (to prevent cavitation) and machining techniques, especially complex shapes. High-precision propellers require high-end multi-axis linkage machine tools! Some time ago, CCTV reported that the Chinese aircraft carrier Liaoning replaced the propeller data, which indicates that China has completely achieved breakthroughs in the manufacturing technology of a large-scale ship propeller precision welding , manufacturing and installation. The propeller technology of large ships has been a barrier to the development of large ships in China for quite a long time. Refer to the US Bush aircraft carrier propeller data: Nimitz CVN 77 Bush aircraft carrier propeller diameter 6.4 mete...

Crazy: Iron O re P rices H it A nother  F ive-year H igh! The G rowth R ate of P ig I ron P roduction W as 6.6%. The O utput of C astings B egan to D ecline. Are t he F oundries D umping G oods? Trader price "fear high" stepping down inventory: Since the beginning of this year, the price of iron ore has risen from 450 yuan per ton. At the beginning of July, it has hit a new high in the past five years, reaching a high point of 924 yuan per ton. But still linger near the high point. Then, the iron ore price has risen sharply within half a year, what impact will it have on domestic related companies? In addition to traders stepping up to inventory, steel companies are also stepping up shipments. The person in charge of a steel company in Hebei told the reporter that at present, the sales profit of downstream finished products has actually not kept up with the increase in raw material prices, but if it does not increase the strength of the warehouse, it is likely ...