直通炉 through furnace; belt furnace
直通偏流 through bias
直通清除 through scavenging
直通式炉 continuous passing furnace
直通式迷宫密封 straight-through labyrinth
直通丝锥 non-reversing tap
直通通路 through path
直通线 through line; through-line
直通线路 direct circuit; straight circuit; straight-forward circuit
直通线群 direct group
直通型 through-type
直通型检测器 flow-through detector
直通行 direct line; directline
直通旋塞 straight way cock; straight-through cock; straightway cock; through cock
直通压出 straight through extrusion
直通制 straight forward system
直通中继 straightforward trunking
直通中继线 direct trunk
直通中继站 repeater without drop

线槽拖
线槽 trunking
线槽节距 slot pitch
线槽脉动 slot ripple
线槽系数 slot factor
线槽占空系数 slot space-factor
备注：
线槽拖实在没找到，只有线槽。