Hebei Hankai wiper seal
The mention of 55%, 80%, and 10% in relation to oil seals might reflect various metrics or considerations concerning their performance and application. For example, in many mechanical systems, seals can be categorized based on their efficiency, effectiveness in preventing leakage, and their material composition. A 55% rating might refer to a baseline performance measure for standard oil seals, whereas an 80% rating could indicate high-performance seals designed for rigorous applications. On the other hand, a 10% figure could relate to the failure rate or the operating conditions under which these seals can be compromised.
55 80 10 oil seal

Cyanidation is preferred in the gold mining industry for several reasons. First, it is highly efficient; cyanide can extract up to 97% of available gold from ores, making it suitable for low-grade deposits that would otherwise be economically unfeasible to mine. Second, the process is relatively cost-effective compared to other extraction methods, such as gravity separation or amalgamation with mercury.
cyanide to extract gold
