First, the first enquiry of the insulated bolt can know about whether the buyers master the

technique of insulated railway or not? And do they have the capacity of independent

processing. Some motorized transfer cart manufacturers purchase the insulated bolts from

other industry, so they quote very high or don't quote.

Second, the buyers don't enquiry the chosen product directly, but to enquiry the non-standard big tonnage product. Many manufacturers have no ability to design and can only

to produce the products according to the drawing. And the manufacturers have no actual

strength to produce big tonnage products. All these situations show this company have no

large actual strength.

Third, in the chat, to know about the water used in production, the price of electricity and

the price of commodities are the ignorable factors of the cost of production.