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。
Special keel is divided into PVC and Aluminum Alloy two materials, the main ingredient is PVC soft structure, soft buckle edge is made from PVC with some special additives.
专用龙骨分为PVC和铝合金两种材质，软膜的主要构造成份是PVC，软膜扣边也是由PV C以几种特殊添加剂制成。
This product by the sponge, compound nettings, the aluminum alloy rib, the buckle and so on is composed.
本产品由海绵、复合网布、铝合金肋骨、扣带等组成。
This product by the sponge, compound nettings, the aluminum alloy rib, the buckle and so on is composed.
本产品由海绵、复合网布、铝合金肋骨、扣带等组成。
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