ปัญหาของการ กำหนดระยะห่างระหว่างบรรทัด....ของ fpdf

<?php
require('fpdf.php');

define('FPDF_FONTPATH','font/');
class PDF extends FPDF
{
	
function LoadData($file)
{
	//Read file lines
	$lines=file($file);
	$data=array();
	foreach($lines as $line)
	$data[]=explode(';',chop($line));
	return $data;
}

function Header()
{
	
	$this->Image('image/logo.jpg',5,6,20);
	$this->AddFont('cordiab','','cordiab.php');
    $this->SetFont('cordiab','',12);
	$this->SetLeftMargin( 30 );
    $this->Cell(0,5,iconv('UTF-8','TIS-620','บจก. ตั้งใจกลการพัฒนา (ศูนย์ซ่อมบำรุง)'), 0 , 1  );
    $this->Cell(0,5,iconv('UTF-8','TIS-620','เลขที่ 62/49 ถ.วังตอ ต.ทับเที่ยง อ.เมือง จ.ตรัง 92000'), 0 , 1 );
    $this->Cell(0,5,iconv('UTF-8','TIS-620','โทรศัพท์ : 081-111-2233'), 0 , 1  );
	$this->line(5, 28,200,28);
	$this->SetLeftMargin( 5 );
	
}
function Footer()
{
	$this->SetLineWidth(0.5);
			$this->AddFont('cordia','B','cordia.php');
			$this->SetFont('cordia','B',12);
			//นับจากขอบกระดาษด้านล่างขึ้นมา 15 มม.
			$this->SetY(-15);
			$this->Cell(0,0,iconv( 'UTF-8','TIS-620',''),1,0,"C");
			//นับจากขอบกระดาษด้านล่างขึ้นมา 10 มม.
			$this->SetY(-38);
			$this->Cell(80,0,iconv( 'UTF-8','TIS-620','__________________________________'),0,1,"C");
			$this->Cell(190,0,iconv( 'UTF-8','TIS-620','__________________________________'),0,1,"C");
			$this->Cell(300,0,iconv( 'UTF-8','TIS-620','__________________________________'),0,1,"C");
			//นับจากขอบกระดาษด้านล่างขึ้นมา 10 มม.
			$this->SetY(-30);
			$this->Cell(300,0,iconv( 'UTF-8','TIS-620','ผู้อนุมัติ'),0,1,"C");
			$this->Cell(190,0,iconv( 'UTF-8','TIS-620','คู่ค้า'),0,1,"C");
			$this->Cell(80,0,iconv( 'UTF-8','TIS-620','ฝ่ายจัดซื้อ'),0,1,"C");
			
			$this->SetY(-15);
			$this->Ln(5);
			//พิมพ์วัน-เวลา ตรงมุมขวาล่าง
	 		$this->Cell(0,0,iconv( 'UTF-8','TIS-620','By... ศูนย์ซ่อมตั้งใจกลการ'),0,0,"L");
			$this->Cell(0,0,iconv('UTF-8','TIS-620','เวลาพิมพ์ :: '). date('d').'/'. date('m').'/'.(  date('Y')+543 ).' '. date('H:i:s') ,0,0,'R');

}

}
//end class
$pdf=new PDF('P','mm','A4');
$pdf->AddPage();
	$objConnect 	= mysql_connect("localhost","root","1234") or die("Error Connect to Database");
	$objDB 	  	 = mysql_select_db("motor");
	$strSQL     	= "SELECT M.branch_no,M.date_order,E.branch_name,E.address,E.tel,M.name
					FROM po_detail B, po_mas M,branch E
					WHERE 
					B.po_id = M.po_id 		AND 
					M.branch_no = E.branch_no AND  
					B.po_id =  '".$_GET["txtKeyword"]."'  ";
	$objQuery      = mysql_query($strSQL);
	$objResult     = mysql_fetch_array($objQuery);
	$branch_no     = $objResult["branch_no"];
	$branch_name   = $objResult["branch_name"];
	$address 	   = $objResult["address"];
	$tel           = $objResult["tel"];
	$date_order    = $objResult["date_order"];
	$name          = $objResult["name"];

	
	$pdf->Ln(15);
	$pdf->AddFont('cordiab','','cordiab.php');
    $pdf->SetFont('cordiab','',14);
	$pdf->MultiCell( 90  , 13 , iconv( 'UTF-8','cp874' , 'บริษัท : '.$branch_name),'LTR');
	$pdf->MultiCell( 90  , 13 , iconv( 'UTF-8','cp874' , 'เบอร์โทร  :'.$tel ),'LR');
	$pdf->MultiCell( 90  , 13 , iconv( 'UTF-8','cp874' , 'ที่อยู่ :'.$address ),'LBR');
	$pdf->SetLeftMargin(110 );
	
	$pdf->SetTopMargin( 5 );
	$pdf->MultiCell( 90  , 13 , iconv( 'UTF-8','cp874' , 'เลขที่ใบสั่งซื้อ:'. $_GET["txtKeyword"] ),'LTR');
	$pdf->MultiCell( 90  , 13 , iconv( 'UTF-8','cp874' , 'วันที่สั่งซื้อ :'.$date_order ) ,'LR');
	$pdf->MultiCell( 90  , 13 , iconv( 'UTF-8','cp874' , 'ผู้สั่งซื้อ :'.$name) ,'LBR');
	$pdf->SetLeftMargin(5 );

	$pdf->Ln(15);
	$pdf->AddFont('cordiab','','cordiab.php');
    $pdf->SetFont('cordiab','',14);
	$pdf->Cell(10,7,iconv('UTF-8','TIS-620','ลำดับ'),1,0,'C'); 
	$pdf->Cell(45,7,iconv('UTF-8','TIS-620','เลขเครื่อง'),1,0,'C'); 
	$pdf->Cell(45,7,iconv('UTF-8','TIS-620','เลขถัง'),1,0,'C'); 
	$pdf->Cell(20,7,iconv('UTF-8','TIS-620','ยี่ห้อ'),1,0,'C'); 
	$pdf->Cell(30,7,iconv('UTF-8','TIS-620','รุ่น'),1,0,'C'); 
	$pdf->Cell(20,7,iconv('UTF-8','TIS-620','สี'),1,0,'C'); 
	$pdf->Cell(25,7,iconv('UTF-8','TIS-620','ราคาซื้อ(บาท)'),1,0,'C'); 
	$pdf->Ln();


$objConnect = mysql_connect("localhost","root","1234") or die("Error Connect to Database");
$objDB = mysql_select_db("motor");
$strSQL = "SELECT M.branch_no,B.chassis_id,B.machine_id,M.date_order,B.brand,B.status,C.type_name,D.color_name,B.buy,A.brand_name,E.branch_name
			FROM po_detail B, po_mas M,brand A,type C,color D,branch E
			WHERE 
			b.po_id = m.po_id 		AND 
			a.brand_id = b.brand 	AND 
			c.type_id = b.type 		AND
			d.color_id = b.color 	AND 
			M.branch_no = E.branch_no AND  
			b.po_id =  '".$_GET["txtKeyword"]."'  ";
//echo mysql_error();
$objQuery = mysql_query($strSQL);
$num=mysql_num_rows($objQuery); 
$t = 1;
while($objResult = mysql_fetch_array($objQuery))
{
	$status = $objResult["status"];
$pdf->AddFont('cordia','','cordia.php');
$pdf->SetFont('cordia','',13);
$pdf->Cell(10,7,$t,'LR',0,'C'); 
$pdf->Cell(45,7,$objResult["machine_id"],'LR',0,'L'); //ชื่อ
$pdf->Cell(45,7,$objResult["chassis_id"],'LR',0,'L'); 
$pdf->Cell(20,7,iconv('UTF-8','TIS-620',$objResult["brand_name"]),'LR',0,'L'); 
$pdf->Cell(30,7,iconv('UTF-8','TIS-620', $objResult["type_name"]),'LR',0,'L'); 
$pdf->Cell(20,7,iconv('UTF-8','TIS-620',$objResult["color_name"]),'LR',0,'L'); 
$pdf->Cell(25,7,iconv('UTF-8','TIS-620',number_format($objResult["buy"],2)),'LR',0,'R');
$pdf->Ln();
$total = $total + $objResult["buy"];

$t++;

}

$pdf->Cell(170,7,iconv('UTF-8','TIS-620','ราคารวม'),1,0,'C');	
$pdf->Cell(25,7,iconv('UTF-8','TIS-620',number_format($total,2)),1,0,'R');
$pdf->Output("report_po_search1.pdf","F");
?>