| 摘要 |
The mould for casting pipes of crooked part comprises an inner crooked mould part having horseshoe shape, an outer crooked mould part having horseshoe shape, a bottom portion having the axis of rotation and an upper mould part. The mould is prepared by the stages of setting up an inner crooked mould on the bottom portion, installing an outer part, covering the upper portion of the mould except for pouring part, lifting and fixing the mould on the axis until the upper portion is in level, pouring concrete, curing and demoulding.
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