W1一 全部为铁镀锌 (galvanized steel)
W2一 螺丝、套管和轴为铁镀锌,钢带为200/300不锈钢(Screw,Coupling and Axis are Galvanized steel.Band is 200/300 series Stainless steel)
W4— 全部为不锈钢 (They are all Stainless Steel.)
W1一全部为铁镀锌 (galvanized steel)
W2一螺丝、套管和轴为铁镀锌,钢带为200/300不锈钢 (Screw,Coupling and Axis are Galvanized steel.Band is 200/300 series Stainless steel)
W4—全部为不锈钢(They are all Stainless Steel.)