door-clamp是什么意思

用法例句

In order to overcome the limit of the lifting weight of the crane, by reasonably selecting the structure of the portal hook for ladle, reducing the its own weight, the need of increasing the tapping of the electric arc furnace is met and the purposes of decreasing the consumptions and increasing the benefits are reached.

为了克服起重机起重量的限制,对钢包龙门钩进行改造。