Also note that the cleaning agent, which is used on high grade aluminum alloy, must not touch the awning cloth.
并且注意，用在高等级铝合金上的清洁剂，不得接触遮阳篷的布。
The hardening characteristic of plastic deformation is also discussed, which is useful to bend the steel tubes of awning on worksite.
利用金属材料弯曲变形时的塑变硬化特性来弯曲矩形管，较好地解决了雨阳棚骨架现场弯曲加工的问题。
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