Patent ID: 8220727

Claim:
A pressure-compensation drip tape, comprising: an outer shell; a plurality of overlapping sheets having at least a double-layered structure, each of the plurality of overlapping sheets being expandable depending on an increase in water pressure; a main passage, which most of the water supplied from a water source flow through, defined by the outer shell and an innermost overlapping sheet of the plurality of overlapping sheets; a plurality of pressure-reducing passages defined between the overlapping sheets; and a plurality of discharge holes, which the water flows sequentially from the main passage to the outside through, formed in the border between the main passage and one pressure-reducing passage, in the border between the pressure-reducing passages, and in the border between the outmost pressure-reducing passage and the outside, wherein the discharge holes are disposed at positions that are offset from each other, and wherein the discharge holes are unbonded parts between the overlapping sheets.