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The coating helps increase that suction force.
而这种涂料有助于增加抽吸力。
youdao
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Holes increase the suction force since they can be placed very close to the orifice.
孔增加了抽吸力，因为它们可以非常靠近管口地设置。
youdao
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Holes increase the suction force since they can be placed very close to the orifice.
孔增加了抽吸力，因为它们可以非常靠近管口地设置。
youdao