The screw consists of core spindle and several hollow screw segments which can be replaced easily for different materials.
该螺杆由芯轴和几个空心螺杆段组成，对于不同的物料，只需更换其中某些空心螺杆段即可。
The screw consists of core spindle and several hollow screw segments which can be replaced easily for different materials.
该螺杆由芯轴和几个空心螺杆段组成，对于不同的物料，只需更换其中某些空心螺杆段即可。
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