The number distribution of diameter grade obeys normal distribution.

雷竹株数按径阶分布服从正态分布。

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The strict requirements for block diameter and grade is difficult to meet when using ordinary blasting methods.

采用普通的爆破方法，难于达到对粒径和级配有严格要求的块度目的。

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Calculation for short columns using Grade Q235 steel tube filled with Grade C30 concrete indicates that the critical diameter to thickness ratio of steel tubes is about 1700.

对Q235钢材、C30混凝土短柱构件的计算结果表明，钢管的最小临界径厚比为1700左右。

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Each day 870, 000 liters of sewage pass through before being discharged, 99% decontaminated, through a 25-centimeter-diameter pipe into the harbor where grade-schoolers learn to tack.

FORBES: Muckraker

The caliber RM58-01, 34mm in diameter, is supported on a baseplate of grade 5 titanium, a material also utilized for the bridges.

FORBES: Richard Mille RM58-01 Tourbillon World Timer