International Standard: C-Q series: AQ, BQ, NQ, HQ, PQ, BQ3, NQ2, NQ3, HQ3, PQ3 T2 series: T2 76, T2 86, T2 101, others. Standard of China: Single tube series: 36, D46, D48, D56, D59, D60, D66, D75, D76, D77, D78, D91, D92, D93, D94, D95, D96, D98, D100, D110, D112, D130, D132,D152, D171, D173, D225, D245, D279, D325 Double tube series: P36, P46, P48, P56, P59, P60, P66, of P75, P76, P77, P91, P94, P110, P130, P150 Rope series: S56, S59, S60, S75, S76, S77, S78, S91, S95, S96, S98
