TianjinZhongshunPetroleumSteelPipeCompanyisspecializedinSSAW,ERWGIPipeandRHSSteelPipesaccordingtoAPI5L，ASTMA252,EN10210,EN10219,AS1163,ASTMA53,A500,

更新时间：2025-07-13 直链：zspipes.com

更新时间：2025-07-11 直链：cimcoltd.com.cn

河北沧州市盐山县螺旋钢管生产制造厂,中原管道制造有限公司致力生产螺旋焊接钢管,防腐钢管,螺旋钢管桩,涂塑钢管,双面埋弧焊螺旋钢管,公司年产值100万吨，防腐160万平方米。按照API5L,ASTM,GB/T等标准进行生产检验。

更新时间：2025-07-03 直链：www.zhongyuanguandao.com

FiiOdesigns,producesandsellshigh-qualityproductsatfavorablepricestothosewholovemusicandstyle;ourhigh-resolutiondigitalaudioplayers,portableheadphoneamplifiers,DACsandearphoneshaveallreceivedpraisefromthemajorityofusers.SeveralproductsfromFiiOhavecreatedrecordsalesintheirrespectiveproductsegmentsandhavereceivedcountlessawards.

更新时间：2025-06-27 直链：www.fiio.com.cn