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Hebei Hankai excavator seal kit
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The 20x30x7 oil seal is typically made from high-quality materials such as Nitrile Butadiene Rubber (NBR), a popular choice due to its excellent resistance to oils and fuels
20x30x7 oil seal. The design incorporates a metal case for added strength and stability, ensuring the seal can withstand the pressures and temperatures encountered in various industrial environments.

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2. Manufacturing and Transportation Costs The processes involved in manufacturing concrete and steel can be energy-intensive, contributing to the overall cost. Moreover, transportation costs, which have risen due to fuel price fluctuations, also affect the prices of these materials, as moving heavy goods over long distances can become expensive.
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