Product signa ad reducers

Vexillum nationale, vexillum Americanum, vexillum Britannicum, et variae pressurae altae non-vexillationes impressae "Clamella ferro iuncta caerimonias" GB/T13401-2005 specificationem ad signa fistulae reducendae
Qualitas reducendi fistulae currenti nationalis vexillum parere debet "Ferro Confoedus inconsutilem Pipe Fittings" GB/T12459-2005
Standard GD0506~0507 of the Ministerio Electric Power
Fibulae genus reducer sulcus
Fibulae genus reducer sulcus
Vexillum nationale (GB/T9112-2000)
Signa mechanica (JB81-59, JB/T74-94)
Petrochemical Standard (SH3406-96)
Ministerium Industry Chemical Signa (HG5010-58, HG20592-97)