The system of valves and cargo lines in the bottom piping network of a tank vessel that connects one section of cargo tanks to another section is called a（）. crossover。 runaround。 come-along。 manifold。
以下（）是利润预算的内容。 营业收入的预算。 债务资本的预算。 利润总额的预算。 税后利润的预算。
1寸钢管的公称直径为（）mm 15。 20。 25。 30。
人工煤气用（）字母来表示 r。 R。 T。 W。
The shipping papers for the products being carried in your tanker are NOT required to contain the（）. exact quantity of the cargoes。 grades of the cargoes。 location of the delivery point(s)。 name of the consignee(s)。
What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）
