... covering material涂料,被覆物... volatile covering挥发性覆盖层... ridge covering脊盖 ...
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half-round ridge covering 半圆脊帽
ridge covering and trench planting 垄盖沟植
film-covering and ridge-forming 起垄覆膜
·2,447,543篇论文数据，部分数据来源于NoteExpress
The rain-feed and ridge culture covering technology for enhancing drought resistant capacity of cultivated land and another way for solving irrigation problem.
利用免耕垄作覆盖技术提高耕地抗旱能力是解决灌溉问题的又一条途径。
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