PURPOSE: water pipe and stone pattern are provided to improve the bottom and side wall on the external inner surface by forming nature stone shape pattern. ;CONSTITUTION: water pipe (100) and stone pattern composition are as follows. Stone pattern (130) is integrally formed in the bottom (110) on inner surface and the embossed shape of side wall (120). Ribs (122) is formed in arriving for the outer surface of side wall and bears soil pressure. Drainage hole (124) is formed in the sidewall. ;The 2012 of copyright KIPO submissions
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