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E15. Main mode of disposal for sewage water
[] 1 Sewage network
[] 2 Covered canal
[] 3 Open canal
[] 4 Grate / swallowing inlet
[] 5 In the sea, in large river
[] 6 In small river
[] 7 Hole dug [in soil]
[] 8 In the street / in the wild
[] 9 Other
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E15. Main mode of disposal for sewage water

Circle the code corresponding to the answer.