9. Nkebi nkebi ígwè ọkpọkọ GB / T8162-1999, ígwè nọmba: 10 #, 20 #, 35 #, 45 # na 16Mn (Q345), Nkọwapụta: 6-720 * 1-70mm 10. Nkebi nkebi ígwè ọkpọkọ maka ibufe mmiri GB / T8163-1999, ígwè nọmba: 10 #, 20 #, 16Mn (Q345), Nkọwa: 6-720 * 1-70mm 11. Obere-ọkara mgbali ji esi mmiri ọkụ tube GB3087 ...
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