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4. Market Demand The demand for galvanized iron sheets varies across different sectors, such as construction, automotive, and appliances. Economic growth can lead to increased construction activity and higher demand for roofing materials, consequently driving prices up. Conversely, during economic downturns, demand may decline, leading to price reductions as factories seek to maintain sales.
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When it comes to sewing with a double needle, there are a few essential tips to keep in mind. First, it's crucial to use the right needle size and type. Typically, a 75/11 or 90/14 ballpoint double needle is recommended for sewing knits, as it helps prevent fabric damage. Additionally, you’ll need to select a thread that is suitable for the type of fabric you’re working with, which often means using a polyester or nylon thread for its strength and stretchability.
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One of the most significant advantages of using a double needle walking foot machine is its efficiency in high-volume production scenarios. The capability to make two seams at once means that manufacturers can save time and labor costs without compromising on quality. Furthermore, the walking foot mechanism grips the fabric firmly, providing better control and precision while sewing. This precision is particularly beneficial for intricate designs or patterns that require exact alignment.