Soil water characteristic curves in different tobacco fields decline rapidly in low suction condition and become smooth and slow while suction growing.

不同烟区的土壤水分特征曲线在低吸力时都比较陡直，随着吸力的增加特征曲线逐渐趋于平缓。

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Remark gas quantity given in the table is quantity at the condition of suction vacuum.

表中气量均为所给真空度的吸入条件下的气量。

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Screw pump should be in suction stop valve fully open under the condition of starting, in case of overload or empty.

螺杆泵应在吸排停止阀全开的情况下起动，以防过载或吸空。

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This involves sealing a foam deep in an open wound under suction to help condition the base tissues to get them ready to receive a graft.

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