Cart Remove item Thumbnail image Product Price Quantity Subtotal × Air Engines:The History, Science, and Reality of the Perfect Engine $46.00 Air Engines:The History, Science, and Reality of the Perfect Engine quantity $46.00 × AS N60-1970 $31.97 AS N60-1970 quantity $31.97 × ASTM E2627-10 $25.00 ASTM E2627-10 quantity $25.00 × AGA Z3801184 $14.00 AGA Z3801184 quantity $14.00 Coupon: Apply coupon Update cart Cart totals Subtotal $116.97 Total $116.97 Proceed to checkout