The price can fall into three categories - direct the most common, indirect where the cost is shifted from the consumer to a third party eg advertiser, or a combination of the two.
价格可以分为三类-直接(最常见)，间接(成本从消费者转移到第三方，如广告)，或两者兼而有之。
Indirect materials including Aluminum Alloy keel or PVC keel, buckle strips, fasteners, adhesives, the relative direct cost of raw materials is slightly lower.
间接原材料包括铝合金龙骨或PVC龙骨、扣边条、固定件、粘结剂等，相对直接原材料费用稍低。
Indirect materials including Aluminum Alloy keel or PVC keel, buckle strips, fasteners, adhesives, the relative direct cost of raw materials is slightly lower.
间接原材料包括铝合金龙骨或PVC龙骨、扣边条、固定件、粘结剂等，相对直接原材料费用稍低。
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