1. Engineering mechanics hku nna, n-gun langai hpra hpe uniform galaw u
2. gusse plate hpe n-gun kaba ai ABS engineering plastic hte galaw da ai rai nna, dai gaw grai ngang kang ai .
3. Bracket hkrang gaw trigoonometry npawt tara hpe hkap la nna, shi a ngang grin ai lam gaw grai kaja ai .
4, stress point langai hpra gaw grai bung ai, grai ngang grin ai
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