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农学
上纲
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上纲
结缚在网衣上方边缘或网口上缘的纲索。是渔具的重要构件。其作用是使网衣上方或网口获得一定形状和尺寸,并承受一定的外力。常见的上纲包含网衣上方边缘为结缚浮子而装配的纲索,称为浮子纲;以及为增加网衣上方边缘强度的纲索,称为上缘纲。
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flicker frequency
flickering
flickering binary
flickering meteor
flickering star
flickering white dwarf
flicker noise
flicker phase
flicker photometer
flicking and poking
flicking stone pulse
flight accidents
flight accident symptoms
flight altitude
flight assistant decision-making
flight attendant
flight attitude
flight block of photography
Flight condition
flight control
flight control actuation system
flight control computer system
flight control of morphing flight vehicle
flight control of multi-rotor vehicle
flight control system
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