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Earth cut slop sidewalk construction or the afforestation used in the rice straw or mat from the ground is used in order to fixing wheat difference , pure wood in the compression the part connected with a environmental protection mat for recording for securing the hinge is disclosure. Said tapered a plurality of integrally connected fixture; said shrinkable upper bent stepwise and integrally formed with one head; and said and the tapered part is through until a lower end of said head is inserted into a, a through hole is formed at the center, a washer; characterized in that including a.