The points for attention in designing the serration axle are pointed out.
指出了漸開(kāi)線螺旋花鍵軸幾何尺寸設(shè)計(jì)時(shí)應(yīng)注意的問(wèn)題.
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Cut the edge of the card by pinking shears to make serration or wave patterns.
再使用造形剪刀將卡片的邊緣剪成鋸齒或波浪狀,以增加美感.
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"the serrations of a city skyline"
"the pliers had serrations to improve the grip"
"one of the serrations was broken off"