The change in pressure can be recorded by means of a pen arm on a rotating drum.

气压变化可以借助在转动的钟筒上移动的笔记录下来。

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Procedure of manually combing large size unit's Feed water Pump is complex and easy to cause much change of drum level.

大机组给水泵手动并泵操作复杂，易造成汽包水位大幅波动。

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For the fact that the present sulphuric acid price is low, it is proposed to change the production of compound fertilizer from rotary drum steam granulation to ammonia and acid granulation process.

针对当前硫酸价格低，提出了把转鼓蒸汽造粒生产复合肥工艺改为氨酸法造粒生产复合肥。

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Change the shape of the drum and you change the tyre that emerges.

ECONOMIST: Re-inventing the wheel

The guitar riffs could be in a variety of garage-rock or even dance songs the group has flirted with both styles but are pounded into Fall material by drum patterns that rarely change.

NEWYORKER: Plug and Play

In fact, a drum that is beaten pretty often is that action by journalists and audiences has power to change publisher behaviors.

FORBES: DoritosGate's Distractions: Watch The Wire, Not The Angel