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1.The engineer graded the ply belt according to its strength and durability.
工程师根据强度和耐用性对分级皮带进行了分类。
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2. The new ply belt is more durable than the old one, which makes it a better choice for heavy-duty applications.
新分级皮带比旧的更耐用，更适合用于重载应用。
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3. The company's new product line features a range of high-quality ply belts that are suitable for various industrialuses.
公司推出的新产品线包括一系列适用于各种工业用途的高质量分级皮带。