pulse spark technique 电脉冲沉积技术

electro spark technique 电脉冲沉积技术

high frequency electro spark technique 高频电脉冲沉积技术

Spark-erosion technique 火花腐蚀技术

spark erosion technique 电火花加工技术

electro-spark cladding technique 电火花熔覆

electric spark strengthening technique 电火花强化技术

spark surface hardening technique 电火花表面强化技术