... head contact；油缸头部接触 head contact area；油缸头部接触区 head counterbore；油缸头部埋头孔(沉孔) ...
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head contact area
头部接触面积
以上为机器翻译结果，长、整句建议使用 人工翻译 。
With our Air Pillow the contact area between head and pillow is increased which supports your neck vertebrae as well as your head enabling you to enjoy a really good "nights" sleep;
头部枕入气枕后，由于接触面较大，更利于承托你的脊椎和头部，让你享受舒适的睡眠；
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