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一台泰山-15小四轮拖拉机,起动困难、工作无力、冒烟严重,更换柱塞、喷油嘴、出油阀后仍不见好
A Taishan -15 small four-wheel tractor, start difficult, work weak, serious smoking, replace the plunger, nozzle, the valve is still not good after