蜜桃AV无码成人黄网站观看,蜜桃在线观看AV,国产亚州AV水蜜桃,蜜桃视频免费下载APP官方

油管，套管及天然气用无缝管

GB/T 9711.2
SY/T 6194

L210  L245
L290  L360

API 5CT

J55 37Mn5
N80 36Mn2V
P110 41MnV5

管线蜜桃在线观看AV

GB/T 9711.1

API 5L

A,B,X42 ,X52,X60,X70

锅炉、压力容器，热交换器化工用无缝管

GB 3087
GB 5310
GB 6479
GB 9948
GB 18248
GB/T 18984

10,20,20G 16Mn,37Mn
12CrMo 12Cr1MoV
15CrMo ,35CrMo,
10MoWVNb
etc

ASTM A53
ASTM A106
ASTM A333
ASTM A334
ASTM A556
ASTM A179
ASTM A192
ASTM A210

GR.A,B,
GR.A,B,C

GR1,GR6

GR.A-1,GR.C

DIN 1629

DIN 17175

St 37.0
St 44.0
St 52.0

St 35.8
St 45.8
17Mn4
15Mo3
13CrMo44

精密结构、汽车零部件用无缝管 
异形蜜桃在线观看AV

GB/T 3639
GB/T 3094
GB/T 8713
GB/T 8162

10 20 35 45 16Mn,
12CrMo,15CrMo
12Cr1MoV,40Mn2,
20CrMo,42CrMo
etc

ASTM A519

1020
1025
1026
1035
1045
4130 etc

DIN 2391

St 35
St 45
St 52

合金蜜桃在线观看AV

ASTM A213
ASTM A209
ASTM A335
ASTM A199

T11 T12 T22 T5 T9
T1 T1a T1b
P11 p22

输送流体无缝管

GB/T 8163

10，20，25
Q295，Q345， 
Q460 etc