In one embodiment the selected period depends on the speed of the secondary station.

在一个实施例中，所选择的周期取决于从站的速度。

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The Dual Remote Weapon Station is equipped with two weapons, the primary weapon can be a 40 mm AGL or a 12.7 mm heavy machine gun, and the secondary weapon is a 7.62 mm machine gun.

双遥控武器站装备有两个武器，主武器是一个40mm口径的榴弹炮或12.7mm口径的重型机枪，副武器则是一个7.62mm口径的机枪。

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The paper analyses the principles of adding a vertical secondary pump station, deduces a formula of energy-saving by adding a secondary pump station, and gives a calculation example.

分析了二级供水站的设置原则，推导出了设置二级供水站的节能计算公式，并给出了计算示例。

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But Cmdr Hadfield insisted his social media activities were secondary to his main functions at the space station.

BBC: Chris Hadfield: 'Space was too good not to share it'

The company no longer runs a TV relay station, or schools (both primary and secondary levels), hospitals, and guesthouses at each of the islands where it operates.

CNN: Tin Time in Indonesia

Without being prescriptive it is expected that a typical station configuration will consist of a primary tide gauge, two under water pressure sensor (secondary tide gauge), data logger, DCP geostationary satellite transmitter, modem, battery backup, solar panel, cables, mountings.

UNESCO: EDUCATION