The lifting capacity of the overhead crane can be 5t, 10t (single hook), 15t/3t, 20t/5t, 30t/5t, 50t/10t, 75t/20t, 100t/20t, 125t/20t, 150t/30t, 200t/30t, 250t/30t (double hook) and many others. The numerator in the number is the primary hook weight, and the denominator is the secondary hook weight.
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