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A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...
Singaporean mahjong and Malaysian mahjong are two similar variants with much in common with Hong Kong mahjong. Unique elements are the use of four animal bonus tiles (cat, mouse, cockerel, and centipede) as well as certain alternatives in the scoring rules, which allow payouts midway through the game if certain conditions (such as a kong ) are met.
A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [ 1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.
A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process. In the process industry, a standard set of symbols is used to prepare drawings of processes. The instrument symbols used in these drawings are generally based on ...
In the traditional Hong Kong scoring system or the Cantonese scoring system, scoring tends to be low due to the few criteria used. The general scoring modifiers apply (see above), with the point translation function being a piecewise function: a constant amount is given for scoreless hands, and the score is doubled for each point (that is, an exponential function).
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