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[adj.] welding + noun
welding 此处为形容词用法，放在名词前，表示“焊接用的”。
Buy a welding helmet before you start.
开始前买一个焊接头盔。
焊接
weldings — plural of welding
先理解核心含义，再看它在真实句子里的用法。
焊接
the process of joining two pieces of metal together by heating them until they soften and then applying pressure
Buy a welding helmet before you start.
开始前买一个焊接头盔。
焊接的动作或过程。
The action or process of welding:
通过加热软化并施加压力将两块金属连接在一起
fastening two pieces of metal together by softening with heat and applying pressure
Welding is a valuable skill in many construction jobs.
焊接在许多建筑工作中是一项宝贵的技能。
The workers did the welding on the bridge at night to avoid traffic.
工人们夜间在桥上做焊接，以免影响交通。
Careful welding of thin metal requires a steady hand.
仔细焊接薄金属需要手稳。
welding 此处为形容词用法，放在名词前，表示“焊接用的”。
Buy a welding helmet before you start.
开始前买一个焊接头盔。
the welding of sth 是名词性结构，强调焊接某物的过程。
The welding of steel requires high temperatures.
钢的焊接需要高温。
Not this
He made a welding on the broken pipe.
Use this
He did some welding on the broken pipe.
焊接（welding）表示行为或工艺时是不可数名词，不能用不定冠词"a"；要表达一次具体的焊接操作，可用"did some welding"。
Not this
She is interested in welding of old cars.
Use this
She is interested in welding old cars.
动名词"welding"可直接带宾语，不需要介词"of"。当"welding"后接动词对象时，应直接使用"welding + 对象"；若用名词短语，则需说"the welding of old cars"，但常见的口语用法是直接跟宾语。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
焊枪；焊接喷灯
The welder adjusted the flame on the welding torch.
焊工调整了焊枪上的火焰。
焊条
You need to choose the right welding rod for this metal.
你需要为这种金属选择合适的焊条。
电焊机
He bought a new welding machine for his workshop.
他为车间买了一台新的电焊机。
电弧焊
Arc welding is widely used in construction.
电弧焊广泛应用于建筑业。
焊缝
Inspect the welding seam carefully for cracks.
仔细检查焊缝是否有裂纹。
点焊
Spot welding is common in car body repair.
点焊在汽车车身修理中很常见。
Use weldings naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
wedding(婚礼)连人，welding(焊接)连金属；拼写上多出的 l 就像一根焊条，把两块铁焊在一起。
语域：neutral 常见场景：工厂与制造业、技术操作说明、职业安全培训 该词在表示焊接这一工艺或操作时，通常为中性语体；多用于工业、制造、维修和技术说明等场合，日常提及焊接工作也比较常见，但整体偏技术性。
真正与 welding 押韵的是 melding、gelding（/ɛldɪŋ/）。melting 形近但 /l/ 后是 /t/；wedding 开头虽同 /wɛ/ 但缺少 /l/；building、holding 拼写同为 -lding，但重读元音不同。
Dictionary facts from ECDICT, WIKTIONARY.