Compression Springs, valve springs, cushion springs. ISO 10243, DIN 2098, JIS B 5012, GB /T 2089, GB /T 2087, GB 4142, GB /T 36524witec2020-11-09T00:46:25+08:00
Extension Springs, Window springs. GB /T 2087, GB /T 2088, GB 4142, GB /T 1973.witec2020-10-15T01:05:06+08:00