Under the alternating load. the chain of high-speed heavy-duty bucket hoist passes through hundreds of thousands or more shocks. and the final failure mode is mainly chain plate fatigue fracture. There is no report on this kind of chain fatigue tester at home and abroad. https://www.bekindtopets.com/save-big-3-Pack-Lace-Trim-Brazilian-Panties-Grey-And-Red-great-buy/