所謂楔形磚均指至少有兩個“小面”(寬與厚形成的表面,也稱頂面或端面)、兩個“中面”(長與厚形成的表面,也稱側面)或兩個“大面”(長與寬形成的表面)為對稱梯形的六面磚體。那么斜形磚乃指兩個“大面”為直角梯形的六面磚體。
以前,國內外曾按對稱梯形面發生在磚的哪個表面來規定或區分側厚楔形磚、豎厚楔形磚或豎寬楔形磚這3種楔形磚的:側厚楔形磚的“小面”(頂端面)為對稱梯形,豎厚楔形磚的“中面”(側面)為對稱梯形,豎寬楔形磚的“大面”為對稱梯形。
僅以(yi)對稱(cheng)梯(ti)形(xing)面(mian)(mian)(mian)(mian)(mian)發(fa)(fa)生(sheng)在(zai)磚(zhuan)的(de)(de)(de)部位(wei)(wei)來定(ding)義(yi)楔形(xing)磚(zhuan)的(de)(de)(de)名稱(cheng)是不全面(mian)(mian)(mian)(mian)(mian)的(de)(de)(de),因為(wei)(wei)發(fa)(fa)生(sheng)在(zai)某表面(mian)(mian)(mian)(mian)(mian)的(de)(de)(de)梯(ti)形(xing)面(mian)(mian)(mian)(mian)(mian)有(you)(you)兩個方向(或(huo)方位(wei)(wei))。例(li)如對稱(cheng)梯(ti)形(xing)面(mian)(mian)(mian)(mian)(mian)發(fa)(fa)生(sheng)在(zai)小(xiao)面(mian)(mian)(mian)(mian)(mian)的(de)(de)(de)六(liu)面(mian)(mian)(mian)(mian)(mian)磚(zhuan)體(ti),除了梯(ti)形(xing)面(mian)(mian)(mian)(mian)(mian)上(shang)下底(di)位(wei)(wei)于(yu)厚度(du)上(shang)稱(cheng)之(zhi)為(wei)(wei)側(ce)厚楔形(xing)磚(zhuan)外(wai),還(huan)有(you)(you)梯(ti)形(xing)面(mian)(mian)(mian)(mian)(mian)旋轉90°(即上(shang)下底(di)位(wei)(wei)于(yu)寬(kuan)度(du)上(shang))的(de)(de)(de)另一(yi)種薄寬(kuan)楔形(xing)磚(zhuan),日本用(yong)于(yu)砌筑化鐵(tie)爐(lu),稱(cheng)為(wei)(wei)化鐵(tie)爐(lu)磚(zhuan),再譬如對稱(cheng)梯(ti)形(xing)面(mian)(mian)(mian)(mian)(mian)發(fa)(fa)生(sheng)在(zai)大面(mian)(mian)(mian)(mian)(mian)上(shang)的(de)(de)(de)六(liu)面(mian)(mian)(mian)(mian)(mian)磚(zhuan)體(ti),除了梯(ti)形(xing)面(mian)(mian)(mian)(mian)(mian)上(shang)下底(di)位(wei)(wei)寬(kuan)度(du)上(shang)稱(cheng)之(zhi)為(wei)(wei)豎寬(kuan)楔形(xing)磚(zhuan)外(wai),還(huan)有(you)(you)上(shang)下底(di)位(wei)(wei)于(yu)長度(du)上(shang)(即梯(ti)形(xing)面(mian)(mian)(mian)(mian)(mian)旋轉90°)的(de)(de)(de)稱(cheng)之(zhi)為(wei)(wei)梯(ti)形(xing)磚(zhuan),前蘇聯用(yong)于(yu)砌筑盛鋼桶。
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