看反面應(yīng)該是這4個腳是光耦.
431是芯片嗎?

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忘了上正面了.

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這個就是光耦吧.

500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖,點擊可放大。\n按住CTRL,滾動鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/81/51541254127038.jpg');}" onmousewheel="return imgzoom(this);">