外觀對比：

    1.WAIGUANLAIKANBUXIUGANGGUANYIBANCHENGBAISEQIEWUXIU。PUTONGWUFENGGANGGUANBIAOMIANHUIYOUFUXIUHUOHONGHESE。

BUXIUGANGNAIFUSHI，GUANGJIEDUYAOBIPUTONGGANGGUANHAODEDUO。DENGDENG

   2.無縫鋼管工藝上是拉制的，沒有焊接縫，材質上可以是普通20號鋼，也可以是不銹鋼;

PUTONGBUXIUGANGGUANYIBANGONGYISHANGSHIHANJIEDE，CAIZHISHANGSHIBUXIUGANG。

    BUXIUGANGWUFENGGUANSHIYIZHONGJUYOUZHONGKONGJIEMIAN、ZHOUBIANMEIYOUJIEFENGDECHANGTIAOGANGCAI。GAICHANPINDEBIHOUYUEHOU，TAJIUYUEJUYOUJINGJIXINGHESHIYONGXING，BIHOUYUEBO，TADEJIAGONGCHENGBENJIUHUIDAFUDUDESHANGSHENG；GAICHANPINDEGONGYIJUEDINGTADEJUXIANXINGNENG，YIBANWUFENGGANGGUANJINGDUDI：BIHOUBUJUNYUN、GUANNEIWAIBIAOGUANGLIANGDUDI、DINGCHICHENGBENGAO，QIENEIWAIBIAOHUANYOUMADIAN、HEIDIANBUYIQUCHU；TADEJIANCEJIZHENGXINGBIXULIXIANCHULI。YINCITAZAIGAOYA、GAOQIANGDU、JIXIEJIEGOUYONGCAIFANGMIANTIXIANLETADEYOUYUEXING。

    HANJIEGANGGUANJIANCHENGHANGUAN，CHANGYONGGANGCAIHUOGANGDAIJINGGUOJIZUHEMOJUJUANQUCHENGXINGHOUHANJIEZHICHENGDEGANGGUAN。HANJIEGANGGUANSHENGCHANGONGYIJIANDAN，SHENGCHANXIAOLVGAO，PINZHONGGUIGEDUO，SHEBEITOUZISHAO，DANYIBANQIANGDUDIYUWUFENGGANGGUAN。20SHIJI30NIANDAIYILAI，SUIZHUYOUZHIDAIGANGLIANYASHENGCHANDEXUNSUFAZHANYIJIHANJIEHEJIANYANJISHUDEJINBU，HANFENGZHILIANGBUDUANTIGAO，HANJIEGANGGUANDEPINZHONGGUIGERIYIZENGDUO，BINGZAIYUELAIYUEDUODELINGYUYOUQISHIZAIHUANRESHUIBEIYONGGUAN、ZHUANGSHIGUAN、ZHONGDIYALIUTIGUANDENGFANGMIANDAITILEWUFENGGANGGUAN。