I think his failure in the experiment resulted ________ his carelessness.
from
暂无解析
不合格与缺陷()
()在钢中能引起钢在热加工时开裂,即产生所谓热脆
物体只要受力,就会发生塑性变形。
“GB”是()的缩写代号
密集烤房加热室封头表面应均匀焊接弧形表面散热片,其中高度30mm、厚度4mm、长度350mm和短片14个