Based on the test data published for leaking steam flow rates of brush type seals, determined was the permeability coefficient of the porous medium of the bristle pack.

根据发表的刷式密封泄漏量试验数据，确定了刷丝束多孔介质的渗透率系数。

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It was suggested that tending should hinge on local conditions. Bamboo grove should not be weeded, where brush was not luxuriant and the soil was porous.

建议竹林抚育要因地制宜，对杂灌不繁茂、土壤较疏松的竹林不劈草。

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