o-typeCOCA¹⁸⁹⁴²⁴BNC²³⁶²¹³⁺¹ 基本例句 🌏闭式；粗萃液对人类；全平衡型音量衰减器 The II-type and O-type expansion loops are the common compensators used in compensating the thermal deformation of steam injection pipeline of heavy oil recovery in oilfield. 目前油田稠油热采注汽管网的热变形主要采用方形补偿器和球形补偿器两种补偿方法。 cnki