We can produce all kind of button like circular button, corn, bump nail, metal pearl, button bottom with the material of iron, copper, stainless steel, alloy.

能生产各种不锈钢、铜、铁、合金等材料的圆形扣、鸡眼、撞钉．钮底、平珠和钮扣配套的辅料产品。

youdao

Despite literally hundreds of attempts in front of the lens and several more behind it, we've only managed it once -- we found it impossible to nail down the correct timing between the home and power button pushes.

ENGADGET