lead ballの例文

• and they put a projectile , either a rock or a lead ball
  弾にする石や鉛玉を
• load dogusuri (gunpowder ) then a lead ball in gun muzzle (the cartridge was invented later and then the time and effort of loading largely decreased ).
  銃口へ発射薬である胴薬と弾丸を装填する（後に早合が発明されると装填の手間は大幅に軽減した）。
• also , it is not necessary to clean the gun barrel and pan so often; it needs to be cleaned only after abnormalties are found such as difficulty inserting a lead ball .
  また銃腔内や火皿の清掃は頻繁に行う必要はなく、弾が込め難い等の異常を感じたら行えば済む。