private void bảoDưỡngThiếtBịToolStripMenuItem_Click(object sender, EventArgs e)
{
frmThietbi bdtb = new frmThietbi();
bdtb.MdiParent = this;
bdtb.Show();
}
private void quảnLýThiếtBịToolStripMenuItem_Click(object sender, EventArgs e)
{
frmThietbi thietbi = new frmThietbi();
thietbi.MdiParent = this;
thietbi.Show();
}
