90mm

Multilevel-tension PLC control system of Φ 90mm reversible experimental four high mill

Φ90mm实验型四辊可逆轧机多档张力PLC控制系统

Splitting failure analysis of the φ 90mm low chromium casting alloy ball during the falling ball test

φ90mm低铬铸球开裂失效分析

Normally , the maximum crack length after perforation of casing pipe must not exceed 90mm ;

通常规定，油层套管射孔后裂孔率不得超过30%，孔裂长度最长不得超过90mm。

Development of Φ 90mm metal packer

Φ90mm金属封隔器的研制

In this paper we discussed the design method of the small-scale acoustic compressor used to drive thermoacoustic refrigerators with transitional size ( 90mm ) under stationary working condition .

本文主要讨论了给定工况下、过渡尺寸（90mm级）的小型热声制冷机用声压机的设计计算方法，并给出了设计结果。

The work piece is made of steel 45 with the size of 12 5mm × 12 5mm × 90mm . The reliability of the model has been testified by comparison of the simulation and the experimental results .

对尺寸为125mm×125mm×90mm的45钢试样的瞬态传热过程进行三维模拟，验证了模型的可靠性。