词汇	double helical
释义	double helical 双螺旋形的,双螺旋的
随便看	phase angle measuring relay phase-angle measuring relay phase angle meter phase-angle meter phase angle modulation phaseangle of a current transformer phase angle of a current transformer phase angle of a voltage transformer phase-angle of a voltage transformer phase angle of meshing phase angle of me shing phase-angle of reflection coefficient phase angle of the escapement phase angle of unbalance phase-angle regulator phase angle relay phase-angle response phase angles phase angle stabilization phase anti-terrorism exercise phase approach phase, aqueous Phase arc furnace for steel melting phase area phase area integral