Batang berulir is a long, cylindrical metal rod with threads running along its entire length. It is commonly used in construction, manufacturing, and mechanical applications for fastening and securing components. The rod can be cut to specific lengths and may be paired with nuts, bolts, or washers to create a secure fastening system.
Kumpulan teknologi cecair ialah syarikat pertama di utara China yang pakar dalam bidang perlindungan kebakaran.
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