中最高者。高頻功率放大器大多工作于丙類。但丙類放大器的電流波形失真太大，因而不能用于低頻功率放大，只能用于采用調(diào)諧回路作為負(fù)載的諧振功率放大。由于調(diào)諧回路具有濾波能力，回路電流與電壓仍然極近于正弦波形，失真很小。
2、畫圖的時(shí)候，放大或縮小圖形的用具。也叫放大尺。


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主營：


德國博世力士樂REXROTH:電液換向閥，平衡閥，調(diào)速閥，溢流閥，減壓閥，順序閥，電磁閥，比例閥，單向閥，手動(dòng)閥，單向閥節(jié)流閥，壓力開關(guān)繼電器，柱塞泵，馬達(dá)等系列優(yōu)勢(shì)產(chǎn)品。
美國伊頓威格士VICKERS:電磁閥大量現(xiàn)貨，電液換向閥，疊加閥，溢流閥，葉片泵，柱塞泵價(jià)格貨期優(yōu)勢(shì)供應(yīng).
丹尼遜DENISON   瑞士萬福樂WANDFLB1
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