【物理】内螺丝线，火花塞仪表【物理】内螺丝线，计算机

internal relation

internal mammary artery

internal hexagonal wrench

Internal Expulsion and Pain-Relieving Decoction

internal root sheath

internal blowing mammary welling-abscess

internal crack【材】;underbead crack【材】

internal focusing (internal focussing)