Product AS - 502 LHD Technical detail of product Left Hand Side Double Needle, Four Thread, Chain Stitch High Speed Sewing Machine. Specially Designed for Auto Valve Making System. For Seaming of Light to Heavy Weight Fabrics such as PP/HDPE Woven Cloth. ARMSTRONG formerly known as STITCHMAN incorporated in 1982. ARMSTRONG is a leading supplier of Machineries & Spare Parts for HDPE / PP Woven ... 9.11.2016 ~ Ahmedabad, Gujarat ~ 1.1 km.