coal seam 煤层
welding seam 焊缝;对
焊缝 weld seam 焊缝
thin seam 薄煤层
welded seam 焊缝;熔
缝 seam welding [化]缝焊
side seam 侧缝;侧骨;摆缝;水平焊缝
longitudinal seam 纵
缝;纵向焊缝;纵向缝 seam line
缝线;模缝线 seam allowance 止口;子口;缝头
circular seam 环缝
seamed with 用…而留下伤疤;因…而长了皱纹
spiral seam 螺旋缝
gassy seam 瓦斯煤层