- 固定 fixed; regular
- 心 the heart
- 軌 rail; track
- 式 type; style
- 轍叉 frog
- 可動心軌轍叉 movable-point crossing; movable-point frog; movable-pointcrossing
- 轍叉心軌尖端 actual point of frog
- 轍叉心軌理論尖端 theoretical point of frog
- 固定轍叉 foxed frog; rigid frog
- 固定瞬心軌跡 space centrode
- 錐形固定心軸 conical stationary mandrel
- 固定式交叉轍叉 rigid crossing frog
- 固定式拼裝轍叉 bolted rigid frog
- 轍叉 [鐵道] frog◇轍叉導(dǎo)軌 lead of crossing
- 定心 [機械工程] mark with the centre; centring; alignment
- 鏈軌式 track-mounted
- 轍叉,岔心 frog
- 轍叉環(huán) frog ring
- 轍叉角 angle of the crossing
- 轍叉心 frog centre
- 轍叉翼 frog wing
- 轍叉趾 toe of frog
- 地心軌道 geocentric orbit
- 浮心軌跡 locus of center of buoyancy
- 高偏心軌道 highly-elliptic orbits
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