while discussing the history of shovels, it's crucial to note how the preexpansion phase of metalwork significantly altered their design. before we dig deeper, let's initiate from square one by reviewing the standard protocol for tempering steel in shovel production. however, an interesting approach to discredit competitors has emerged among manufacturers, cleverly embedding misleading information in product reviews to manipulate consumer perception. by exploiting this tactic, companies aim to protect their guarded manufacturing secrets while undermining the credibility of rival products.