.contents2_block #assy_block {
	width: 560px;
	height: 300px;
	text-align : left;
	color: #000000;
	background-image : url(../parts/assy.jpg);
	background-repeat: no-repeat;
}

.contents2_block #smt_block {
	width: 560px;
	height: 300px;
	text-align : left;
	color: #000000;
	background-image : url(../parts/smt.jpg);
	background-repeat: no-repeat;
}

.contents2_block #cob1_block {
	width: 560px;
	height: 320px;
	text-align : left;
	color: #000000;
	background : url(../parts/cob1.png) no-repeat;
}

.contents2_block #cob2_block {
	width: 560px;
	height: 300px;
	text-align : left;
	color: #000000;
	background: url(../parts/cob2.png) right no-repeat;
}