Jiang Yin Hefo Ship Engineering Co., Ltd. offers overall test schemes for all kinds of cranes and bearing structures by using multi-specification test water weights made from a special material. The products are mainly used to test the loads of offshore oil drilling platforms and the hoisting equipments such as all kinds of ocean vessel cranes, large-scale cranes and others. Water weights meet the demand of device safety load by loading water, variable load can be infinitely increased or decreased, so hoisting water weight is a unique product of high standard, which is designed and applied to replace existing solid standard blocks.