钢管判废依据(Where light tubes approach the low limit of outside diameter, some 'black' threads (perfect at the root and imperfect at the crest) are to be expected beyond the gauge plane, but such 'black' threads shall not be regarded as justification for the rejection of the tubes. 薄壁管的外径接近下限值时，会有一些超过基准面的"黑皮"螺纹(根部完整，顶尖不完整)，但这些"黑皮"螺纹不能作为钢管判废的依据。)
整体管式结晶器(They have applied mathematical models to studying the mechanical behavior of single-piece tube molds for casting billets. 他们已将数学模型应用于研究小方坯连铸用整体管式结晶器的力学性能。)
不锈钢管(An hydraulically operated press of 3000 tonnes' capacity is used to make stainless steel tubes with bores from 25 to 165 mm and outside diameters of up to 190mm. 一台 3000t 位的液压机用于生产内径25 ~ 165mm, 外径最大为190 mm 的不锈钢管。)
