焊接 

Pinyin: hàn jiē 
Meaning：Welding 
Sentence：他焊接一根断了的杆子。He welded the broken rod.

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焊： 

Pinyin: hàn
Meaning: welding
Radical: 火
Stokes: 11
Traditional: 焊
Common words/Phrase:
焊缝[hàn fèng] 【welding line】 
焊条[hàn tiáo] 【welding rod】
焊锡[hàn xī] 【soldering tin】

接： 

Pinyin: jiē
Meaning: To extend; to connect; to receive; to join
Radical: 扌
Stokes: 11
Traditional: 接
Common words/Phrase:
接收[jiē shōu] 【to receive】
接触[jiē chù] 【contact】
接口[jiē kǒu] 【interface (port)】
接待[jiē dài] 【receive (a visit)】
接近[jiē jìn] 【near; close to】