tap to tap time of converter
anterior trapezoidal tubercle
box girder with trapezoidal section
channel with trapezoidal section
damped trapezoidal method
duplex trapezoidal section
inverted trapezoidal box girder
long trapezoidal cross-section steel sheet
open trapezoidal Channel
polysilisone trapezoidal compolymer
posterior trapezoidal tubercle
Trapezoidal Box Section Girder