常见例句雙語例句When an aluminum rivet is upset against a softer material, a washer must be used under the upset head to prevent eruption of the softer material.儅一個鋁鉚釘的鐓頭形成在較軟的材料一邊時，必需在鉚釘鐓頭下使用墊片以防止較軟材料脹裂。 返回 upset rivet