| 摘要 |
PURPOSE: A manhole type open-cut connection pipe for an agricultural channel is provided to dispose of waste pipes safely by dismantling a joint of drainpipes, then recycling and to promote the convenience on removal and conveyance. CONSTITUTION: The manhole type open-cut connection pipe is installed to an agricultural water supply-drainage route, wherein the water flowing in the agricultural water supply-drainage route absorbs the air on the ground to prevent the inflow of various impurities around a drainpipe by having one pneumatic principle and the joint of drainpipes is sealed up completely to prevent the breaking of an embankment caused by flowing water under an embankment.
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