发明名称 |
LAND DRAINAGE SYSTEM |
摘要 |
<p>A land drainage system comprising sub-soil tubes (1) connected to a suction container (3) has the container cvacuated by a dual function system comprising liquid pumping means (4) and air extracting means (6) . A reservoir (5) can contain liquid to be passed into the soil (e.g. for irrigating the land), (With Figure 1 )</p> |
申请公布号 |
CA1257101(A) |
申请公布日期 |
1989.07.11 |
申请号 |
CA19860507311 |
申请日期 |
1986.04.23 |
申请人 |
OY WARTSILA AB |
发明人 |
OLDFELT, SVEN;FRIDOLFSSON, TAGE |
分类号 |
E01C13/02;E02B11/00;E02B13/00;(IPC1-7):E02B11/00 |
主分类号 |
E01C13/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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