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1.The soft croma key is used to connect the two pieces of metal together.
软铬合金键用于将两块金属连接在一起。
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2.The soft croma key is a strong and durable material that can withstand high temperatures.
软铬合金键是一种强韧耐用的材料，能够承受高温。
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3. The soft croma key was designed to improve the strength and durability of the joints in the machine.
软铬合金键被设计用来提高机器接头的强度和耐用性。