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The Harmonized System (HS) Code is developed and maintained by the World Customs Organization (WCO). It consists of six digits that classify products into specific categories. Countries can further expand this code by adding additional digits for national purposes, but the first six digits are harmonized across all WCO member countries. This system helps in reducing confusion in international trade by providing a uniform classification of goods.

The monoprotic acid is hydrobromic acid because only one proton (H) can be given. No monoprotic hydrogen exists. There are two acid protons in the starting acid, sulphuric acid (H2SO4). In other words, the sulfate molecule was bound to these acidic protons.

In summary, the price of a 1000 litre steel water tank can vary widely based on several factors including material quality, design complexity, market conditions, and installation requirements. When making a purchasing decision, consumers should not only consider the initial costs of the tank but also its long-term benefits in terms of durability and efficiency. As the demand for quality water storage solutions continues to rise, the market for steel water tanks is expected to evolve, possibly leading to more innovations and pricing options in the near future. Investing in a steel water tank can be a wise decision for those looking for a robust and safe water storage solution.