upper slot Cutter knife to cut into the lower part of the convexification cancave corrugrted coilia completed the slotted;
下
槽刀通过部的凸刀切入下部的凹刀
楞纸板的缝；
upper slot Cutter knife to cut into the lower part of the convexification cancave corrugrted coilia completed the slotted;
下槽刀通过部的凸刀切入下部的凹刀楞纸板的缝；
声明：以
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