使用间隔管在根茬带开缺口，减小玉米根茬的抬升力。
Two tubes are used to make the maize stubbles pass unobstructed.
在任何超过一般跨距间隔的跨距中不得使用管件或接头。
Fittings or splices shall not be permitted in any span that exceeds the normal span interval.
结节状小叶间隔增厚可见于癌性淋巴管炎、结节病和硅肺。
Nodular thickening of interlobular septa can be seen in lymphangitic carcinomatosis, sarcoidosis, and silicosis.
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