At present, the ethrel stimulation tapping system is a primary tapping system and it greatly enhance the production benefit.
乙烯利刺激割胶制度目前已成为一项主要割胶制度，其生产效益十分显著。
At present, the ethrel stimulation tapping system is a primary tapping system and it greatly enhance the production benefit.
乙烯利刺激割胶制度目前已成为一项主要割胶制度，其生产效益十分显著。
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