Lihlahisoa tsa indasteri e 'ngoe le e' ngoe li tla aroloa ho ea ka mesebetsi le thepa ea tsona, 'me ho joalo le ka indasteri ea li-valve.Mohlophisi oa kajeno o hlalosa haholo hore na valve ea bolo e arotsoe joang.Li-valve tsa bolo li arotsoe ka: belofo ea bolo e phaphametseng, belofo ea bolo e tsitsitseng, belofo ea bolo ea orbital, V-sh ...
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