jumbo reel，jumbo roll是什么意思

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用法例句

Application of gas drainage technology with large diameter horizontal borehole to Qianqiu Coal Mine;

大直径水平长钻孔瓦斯抽放技术在千秋煤矿的应用

Study on the manufacturing and dressing of large diameter diamond wheel for centreless grinding;

大直径无心磨金刚石砂轮制作及修整工艺研究

Numerical control programming research of the large diameter and steep-lead multiple-trapeziform screw thread;

大直径大导程多头梯形螺纹数控编程研究

During the shaping blasting in primal gentle slope,the toe rocks and boulders are produced readily in general deep-hole blasting.

文章以乌龙泉矿西区原始缓边坡为例,从理论上分析了出现这一问题的原因,提出采用大直径孔药壶爆破可较好地处理这一问题。

A special-equipment for processing large-diameter hanging-hole on sheetmetal;

一种加工薄板大直径翻边孔的专用设备

Analysis of residual strain state of large-diameter rock-socketed piles;

大直径嵌岩桩残余应变状态分析

Take this drum for example, citing some key points for designing the higher, large-diameter and thin-thickness wall vessels.

阐述了Ｄｉ４０００ 啤酒发酵罐的有限元应力分析设计方案，并以此为例论述了大直径薄壁较高容器设计时应考虑的几个要点。