鱼鳔中的压力由一个气体腺来管控。
The pressure in the swim bladder is regulated by a gas gland.
控制压力由发光数码管间接显示。
The control pressure is displayed by the luminous digital tubes indirectly.
另外，还开发了一种由脉宽调节管（PWM）、压力控制器、由电脑设定的喷嘴控制系统和基于含量分布图的应用软件组成的变量控制系统。
In addition, a variable rate sprayer, consisted of PWM solenoids, a pressure controller, a nozzle control system interfaced to a computer, and map based application software, was also developed.
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