One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 360
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Fill-in-the-blank: The first component of a valve model is the type code. The code for a gate valve is ( ), the code for a butterfly valve is ( ), the code for a ball valve is ( ), and the code for a globe valve is ( ). Answer: Z D Q J
The first character of the valve model represents the type code: the code for gate valves is (Z), for butterfly valves it is (D), for ball valves it is (Q), and for globe valves it is (J).
Fill-in-the-blank: The first part of the valve model is the type code; the code for gate valves is (Z), the code for butterfly valves is (D), the code for ball valves is (Q), and the code for globe valves is (J).
The first character of the valve model represents the type code: the code for gate valves is (Z), for butterfly valves it is (D), for ball valves it is (Q), and for globe valves it is (J).
The first character of the valve model represents the type code: the code for gate valves is (Z), for butterfly valves it is (D), for ball valves it is (Q), and for globe valves it is (J).
The first character of the valve model represents the type code: the code for gate valves is (Z), for butterfly valves it is (D), for ball valves it is (Q), and for globe valves it is (J).
The first character of the valve model represents the type code: the code for gate valves is (Z), for butterfly valves it is (D), for ball valves it is (Q), and for globe valves it is (J).
The first character of the valve model represents the type code: the code for gate valves is (Z), for butterfly valves it is (D), for ball valves it is (Q), and for globe valves it is (J).