4-22 Special type SPECIAL TYPE K2-6-10-1.6-1.6 (Platform convex with flat plate protrusion) K3-5.1-7.2-1.6-1.2 KF2-5-6.5-1.4 (-1.2 × 1.6) KF2-4-9-1.4 (1.4.4.4.4.4.4.4.4 (1.4 (1.4.4.4.4-1.4-1.4.4.4-1.2 KF.4-1.4-1.2 KF.4-1.2 KF.2 KF.2-1.2-1.2 KF.2-1.2-1.2-1.2-1
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