Naon hartina paku keling buta anu teu cekap nonjol?

Tonjolan anu teu cekap: kusabab gaya putusna paku keling buta teuing handap, paku keling teu acan dipasang sagemblengna, sareng titik putusna paku keling buta pegat, anu nyababkeun tonjolan paku keling buta teu cekap. lumangsung dina kagagalan.

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