The girders are carried on trestles.
这些大梁是由支架撑着.
Describes a sleeve type compensator-the self balancing compensator, which can be used in heating networks to eliminate the blind flange force on primary fixing trestles.
介绍了一种套筒型补偿器&自平衡补偿器,它可用在热力管网中消除主固定支架的盲板力。
简答网 · 高考英语
简答网 · 初中英语作文