Litlamorao tsa Perforation Density Ka Phello ea Perforation ke Efe?
Perforation density e bolela palo ea masoba a perforated ka mithara ea bolelele. Ka kakaretso, letsoalo le phahameng la perforation lea hlokahala ho fumana matla a mangata, empa ha ho khethoa letsoalo la perforation, letsoalo le ke ke la eketseha ka nako e sa lekanyetsoang, mme ...
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