double side form with single side weld
Weld-repair of weld seam
American Institute Time Hull Form {= AITH Form}
exponent form Newton backward interpolation operator in power exponent form
form factor [= wave form factor]
metric normal form of quadratic form
the canonical form of a quadratic form
Unitary-form (U-form) firm
represeuting a complete form sence f rom one thousaud Chinese feet and a detail form from one hundred Chinese feet
accumulated weld inside
adding weld wire inside
after-weld heat treatment
all-position weld of pipeline