tighten up the nut 中文意思是什麼
tighten up the nut
解釋
擰緊螺帽-
Rotate the valve to [ close ] position, put in the valve and install screw, nut and washer, then, tighten them up with hand
將閥門轉到關閉的位置,將閥門放入,安裝螺絲,螺母及華司,然後用手鎖緊。
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