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 There are many cause of filter shortage phenomenon. From a macro point of view, the continuing growth of investment in fixed assets, and so did the rapid development of construction machinery industry, the expansion of domestic demand for the market development of large-scale project filter provides the most direct power. Although country strengthen macro-control of again and again, but in front of the base of the huge market demand, the demand will undoubtedly is an amazing number. Moreover, with the international market expand continuously, the product exports in the past two years has doubled, China construction elevator export amount has accounted for 25% of total sales.
Cleaner production capacity is far couldn't keep up with demand growth. In terms of foreign brands, the prosperity of the global market makes the terex - demag, liebherr, Manitowoc production enterprise sales growth of about 40%, but due to the filter body are manufactured according to the order, and host form a complete set of spare parts is also in accordance with the order shipment, and affected by the manufacturer's own capacity, delivery cycle extension is inevitable. The shortage of production capacity and the deficiency of the key parts plagued by manufacturers and users. Some foreign famous filter manufacturers, President said of most of the filter manufacturers situation: "customers in the queue waiting for the delivery of the goods, and we are struggling for the limited parts. We are working hard, one by one solve the problem of the bottleneck of the manufacturers, in order to make full use of existing venues to produce more products." This shortage phenomenon caused by the long cycle of supply will also continues to haunt the worldwide market of large engineering filter, especially in such a strong demand in the Chinese market.